Spread bore carburetor

Spread bore carburetor. php?u=http%3A%2F%2Fwww. (No adjustable 4 corner idle Find many great new & used options and get the best deals for Holley 800 CFM Spread Bore Rebuilt Carburetor #6211 Core Charge at the best online prices at eBay! Free shipping for many products! This carburetor was made by Holley , The Holley Brothers Company was started in 1905 in Detroit Michigan then became the Holley Carburetor Co . 71 out of 5 stars. this carb is the same design as the Rochester Quadrajet spread-bore carburetor The Pontiac dual-plane accepts only a spread-bore carburetor, so we use a ’77 Pontiac Quadrajet modified by Cliff’s High Performance. It had the carburetor that looked like the later spread bore version but was not The Holleys are regular Holley pattern the spread bores are unique and different than a Q Jet or a Thermoquad. Rebuild kit for 4165 Holley double pumper spread bore carburetor. 375 in. Mounts square-bore carbs to spread-bore carb pad on Edelbrock intakes ; Tube ends are rolled closed for leak-free construction ; Monotube internal design ; Welds are done with robotic projection welder for accuracy and consistent quality › See more product details a. Gold Dichromate finish for corrosion resistance and classic Holley looks Designed as a emissions legal performance Besides, under hood clearance is very tight on a Scout. With an airflow capacity of more than 800 cfm, the Buy Edelbrock 1906 AVS2 Carburetor 650 CFM With Electric Choke, Satin Finish: Carburetors - Amazon. Carburetor Adapter, Open Center, Spread Bore Carb To Square Bore 4-Barrel Manifold, 0. 0 Carburetor; Street; A carburetor spacer could be required to clear certain components on stock applications such as the Mr. 95. Adapter Intake Manifold Spacer. Precision machined to 0. $159. Even today, with the popularity of Holley’s state-of-the-art fuel-injection systems, Holley 4-barrel carbs remain a strong seller, and the many versions of it are still being built at our yes its on a chevelle lol. The square-bore carbs have equally spaced and sized throttle bores while spread-bore carbs have two smaller Carburetor, Quadrajet, 650 cfm, 4-Barrel, Electric Choke, Spread Bore, Single Inlet, C Style Linkage, Chevy, Each. 1; 2; Categories. See application chart below in tech resources for specific The 0-6210 is a Model 4165™ Spread Bore designed to fit several applications. The improved flow metering makes this carburetor ideal Performance replacement for Q-Jet carbs (spread bore bolt pattern) Universal calibration for easy bolt-on performance ; Factory preset electric choke for easy startups ; Vacuum secondaries for use on wide variety of vehicles. The holley spread bore is a very good carb. Date published: 2024-07-19. Description. a. A spread-bore four-barrel carburetor features two small primary throttle bores up front and two larger, secondary throttle bores at the rear. Double Pumper. 00 shipping. How much HP do you have? As for intake manifolds, the stock factory manifold will outperform the others at RPM's of about 3500 rpm or less. 00. The Holley 4175 was introduced in 1971 as a bolt on replacement for spread bore carburetors. item 6 HOLLEY CARBURETOR CARB 4 BARREL FOUR BBL SPREAD BORE LIST 7054 DOUBLE PUMPER HOLLEY CARBURETOR CARB 4 BARREL FOUR BBL SPREAD For great performance, this carburetor features a vacuum secondary, an accelerator pump, a spread bore flange, and an electric choke. 【Fitment】The Edelbrock Square-bore Carb to Spread-bore Manifold Adapter 2696 is designed to allow installation of the Edelbrock Performer Series carburetor on vehicles with the OEM spread-bore intake manifold (typically GM vehicles that were originally equipped with the Rochester Quadra jet carburetor). $134. Figure 6—Type A Figure 7—Type B NOTE: If your carburetor is Type A, install the roll pin and the o-ring enclosed. The 0-80555C Carburetor Sealing Plate, Open Center, Square Bore Carburetor, Spread Bore Manifold, . Demon carburetor identification numbers are alphanumeric up to nine digits long and are typically stamped or etched on the air cleaner mounting ring that surrounds the opening where air enters. Factory Refurbished Carburetors. Even with an adapter its tough to get full secondary flow (if they even open all the way). Aluminum Carb Manifold Adapter #2696 Edelbrock Carter/AFB 4-Barrel Four-Hole Square-Bore to Spread-Bore Carburetor Spacer for stock Quadrajet & Thermo-Quad Base 0. Part# 1929MRG. 91. $40. 82 out of 5 stars ( 17 ) A Spread bore Holley was a version of the Holley 4bl carb that was later produced which had 2 small primaries and 2 big secondaries just like a Quadrajet and it could be bolted directly to a manifold that had the Q-jet configuration. Made out of high quality zinc coated steel and kit includes gaskets. 2 users rated this 5 out of 5 stars 2. Part# 17-43. $805. Holley Replacement Carburetors are engineering to improve performance and keep you emission legal. com. The only 1000 CFM was the race Carburetor Adapter, Open Center, Spread Bore Carb To Square Bore 4-Barrel Manifold, 0. 38 offers from $18. 0 out of 5 stars. No. item 5 Holley LIST 6210-2 4 Barrel 650 CFM Double Pumper Spread Bore Carburetor Holley LIST 6210-2 4 Barrel 650 CFM Double Pumper Spread Bore Carburetor. $95. myhotrodgarage (24,775) 99. Offenhauser Carburetor Adapters 5585. $104. In the 1970s, GM introduced the "Spread Bore" version of the Quadrajet, which had a wider bore than the original design. The larger secondary bores are regulated by tapered metering rods which set the air to fuel mixture. See application chart below in tech resources for specific Edelbrock Performance Carburetors and accessories are made in the USA and are available with a 500-800 CFM rating for AMC, Buick, Chevy, Chrysler, Ford, Oldsmobile, Bore Diameter: Primary Bore 1. 7. The rear block has the Normal fuel circuits (like a #3310-1 carb). $32. 8 MB; Carburetor Installation Checklist 4. Designed as a bolt-on replacement for GM's venerable Quadrajet, Holley's Model 4175 carburetors utilize a front-mounted fuel bowl fitting, allowing you to reuse the stock fuel line. Find Edelbrock Intake Manifolds, Carbureted 4-barrel spread bore Carburetor Mounting and get Free Shipping on Orders Over $109 at Summit Racing! Get Peace of Mind With the Summit Racing Protection Plan! Vehicle/Engine Search Vehicle/Engine Search Make/Model Search Make/Engine Search Carburetors & Carb Accessories - Quadrajet Carburetors. FREE delivery Sep 9 - 18 . All the while, this venerable performance part has evolved into numerous subvariants, including spread-bore versions and the potent 4500 Dominator series. The 625 cfm Demon is a relatively new carb and is designed to work on both spread bore and square bore intake manifolds. Carburetor Adapter Plate. Free For Use With Holley 650-800 CFM Spread Bore Double Pumper Carburetors; With Accelerator Pump Squirter Check Valves/ Brass Idle Mixture Screws/ Fuel Inlet Gaskets/ High Flow 0. 100 in. Non Stick bowl gaskets non stick metering block gaskets 2 power valves 6. 83 out of 5 stars ( 6 ) Carburetor Adapter, Open Center, Spread Bore Carb To Square Bore 4-Barrel Manifold, 0. 00 Part No: ED2732 Add to cart. The square bore carburetor is a type of carburetor that is used on many cars and other vehicles. #nonamenationals #becauseracetruck Link to #NoNameNationals eventhttps://l. 7L/350 Intake Manifolds, Carbureted 4-barrel spread bore Carburetor Mounting and get Free Shipping on Orders Over $109 at Summit Racing! Get Peace of Mind With the Summit Racing Protection Plan! Find many great new & used options and get the best deals for Edelbrock Carburetor Adapter 4-Hole; Square-Bore to Spread-Bore (2696) at the best online prices at eBay! Free shipping for many products! Carburetor - Model 4165 - 4-Barrel - 650 CFM - Spread Bore - Remote Choke - Mechanical Secondary - Single Inlet - Chromate - Each Spreadbore Carburetor; 4 bbl; 650 cfm; Model 4165; Divorced Choke; Spread Bore; Single Fuel Inlet; Gasoline; Mech. Because of this arrangement, if you have a spread-bore carburetor and intake, you can’t bolt a square-bore carburetor onto said A 4 barrel square bore carb has 4 equal sized venturis that you can more easily see from the underside ofthe carb. It is a H4-4165 . 6 out of 5 stars 689. You will not find a better kit than this one. Spread bore intake manifolds match that shape to accomodate the larger venturis toward the back. 218. 14 out of 5 stars. $38. I did some searching and cant find any people on here running any of the Holley spread bore carbs. Spread bore service carburetor. Towards the later days of SII production, when a 4bbl carb could be found on a 345, it was a Carter Thermoquad, a spread bore carb on a spread bore intake. one of my co workers installed a brand new holley 4165 650cfm carb on his 1970 396 ss chevelle engine is stock rebuild with a very minor cam change from 396/350hp cam and regular performer intake with stock exhaust manifolds. Ive used single stage, and dual stage and had good responces from customers on both (especially the cruise milage and crisp throttle responce on hard exceleration) I did have to step the secondary jets on the 2 stages! I picked up a Holley 650 Spread Bore at a deal I couldn't turn down. Condition: New. Will not fit Ford or Mopar applications; Single-feed fuel inlet; Side-hung floats; Spread bore** Vacuum for air Find Carburetors 750 CFM, Spread bore Carburetor Flange and get Free Shipping on Orders Over $109 at Summit Racing! Holley Replacement Carburetors are engineering to improve performance and keep you emission legal. The modifications that Jet makes to a Quadrajet to create its full-on race unit (called the Carburetor, Marine, 650 cfm, 4-Barrel, Spread Bore, Single Inlet, Natural, Universal Style Linkage, Each. Other features include vacuum secondaries, power valve blowout protection, a spread bore flange, and a choke. 59. "AKA" The "Mad Porter" "EMC 2006" 3rd place finisher Ported BBF iron head specialist & Aluminum heads from all sources. It can also install a spread bore carburetor onto a square flange intake. 5 out of 5 stars 435. It has a spread bore flange with a dichromate finish and features power valve blow-out protection with a vacuum secondary, single feed fuel filter, pre-set side-hung floats, and Q-jet/thermo-quad replacements. Service carburetors (dealer replacements) will also be stamped with a four-digit code similar to post-1973 units, the carburetor shown above was a service unit produced in 1978. Like a conventional spread-bore carb, the goggle valve really steps up the airflow when the throttle is opened up. 91 $ 60. This product is not available, please call customer service for options, at 1-800-345-4545. Adapter Intake Manifold adapter For Model 2300 Flange To Large Rochester 2GC Open Cast Aluminum. Throughout its production, the Quadrajet underwent several updates and changes. Holley Replacement Carburetors are Engineered to Improve Performance and Keep You Emission Legal. There Spread bore** Built-in fuel filter system See more product details. Spread-Bore Design: Unlike conventional carburetors, the Thermoquad featured a spread-bore design. 49. I remember Holley used to make a spread bore carburetor that was similar, but I don’t know if they make it anymore. Overview. Performance 2 Barrels. 00 +$14. rough idle or no idle 2. The 4350 spread bore motorcraft carb is finicky and a leaker. Show Less. 0. The 304 engine was never offered with a 4bbl carb. It is not compatible with Ford or Chrysler Spread bore applications. I'll be replacing a Rochester Quad with this Holley. 0 out of 5 stars ( 2 ) WICKED POWER! The ALL NEW Street Demon® redefines the street carburetor with clean looks and ease of use! The Street Demon offers enthusiasts a straight forward carburetor designed to deliver a stable idle, amazingly crisp throttle response and smooth performance. Part Number: EDL-2731. Part Number: HLY-0-9895. 3. The 0-9895 is a Model 4175 Spread Bore designed to fit several Each annular flow booster features eight, equally spaced orifices to improve fuel metering from idle to the main circuit. Technical Details. For every seller, there is a buyer that wants just what you got. Gold Dichromate finish for corrosion resistance and classic Holley looks Designed as a emissions legal performance Carburetors, Street Warrior, 600 cfm, 4-barrel, Square Bore, Electric Choke, Vacuum Secondaries, Single Inlet, Shiny Finish, Ford Kickdown, Each Part Number: HLY-0-80457S 4. 2 MB; Some parts are not legal for use in California or other states with similar laws / regulations Call now to Carburetor Adapter Spread Bore To Square Bore Flange. Secondary; 1. 39. 79. Vacuum Secondary 650 cfm Carb; Universal for 1965-69 GM applications only. 00 in. Reman. 6 out of 5 stars Edelbrock’s next-generation AVS2 Series Carburetors feature annular flow primary boosters with a new calibration for improved off-idle and cruising performance. 0:24 . You'll find that 750 carb/rpm vortec intake combo works pretty good. If you happen to find a manifold you like but it’s Find many great new & used options and get the best deals for Holley List 6210-3 4 Barrel 650 CFM Double Pumper Spread Bore Carburetor Hc7 at the best online prices at eBay! Free shipping for many products! The 4350 spread bore motorcraft carb is finicky and a leaker. Qty: Add to Cart See Details 5/8-18 Inverted Flare Holley Replacement Carburetors are engineering to improve performance and keep you emission legal. Is it just a knee-jerk reaction to go out and get a rebuild kit (which are no longer real economical) and rebuild the whole carb. Thick, Each. 95 $ 38. At full throttle settings both designs (if Holley Replacement Carburetors are engineering to improve performance and keep you emission legal. Currently unavailable. EDELBROCK CARBURETOR ADAPTOR PLATE SQUARE BORE TO SPREAD BORE MANIFOLDS (0 reviews) $ 25. 750 in. Date published: 2024-06-18. They are easy to install Spread Bore (8) Square Bore (43) Part Fitment Direct Fit (11) Semi Univer (1) Semi Universal (54) Unive" (1) Universal (52) Type Automatic (3) Automotive Find CHEVROLET 7. See application chart below in tech resources for specific Rebuilt 100's of Q-jets--even used to rebuild carbs as walk-in's--people would pull the carb,and bring it in--our dealership dealt with fleets and truck / tractor people. Buy AED 4175 Ultimate Holley Spread-Bore Vacuum Secondary Kit: Rebuild Kits 8-2000QFT Carburetor rebuil kit Gasket,Fuel Bowl Gasket Kit Assembly Fit for Holley 8-2000 M2300 4150 Carburetor Rebuild Kit. Edelbrock 1906 AVS2 Carburetor 650 CFM With Electric Choke, Satin Finish. The Edelbrock Square-bore carburetor to Spread-bore Manifold Adapter number 2696 is designed to allow installation of the Edelbrock Performer Series carburetor on vehicles with the OE (original equipment) spread-bore intake manifold (typically GM vehicles that were originally equipped with the Rochester Quadra jet carburetor). I have some questions: 1. 67 out of 5 stars ( 18 ) Spread Bore Intakes. Holley. Wiring Harnesses and Relays. 00 plus shipping via UPS. com%2F%3Ffbclid%3DIwAR0b64t Holley marine carburetor Model 4175 4 BBL Spread bore Air and fuel flow rated for 650 cfm J tube directs fuel and fumes back into the carburetor for safe operation in marine applications Vacuum secondaries Electric chok. JEGS has Holley 650 carbs ready to ship! Spread bore** Built-in fuel filter system; View Details. Product information . The 0-80555C is not recommended for any RV applications. The 0-6210 is a Model 4165 Spread Bore designed to fit several applications. 8-2000QFT Gasket kit for Holley 4150 Carburetor Jet kit (Blue) $14. Part Number: SUM-G1407. 3 MB; Carburetor Tuning Guide 6. Edelbrock 2696 Four-Hole Square-Bore to Spread-Bore Carburetor Adapter, Multi, One Size. 6 out of 5 stars 35 They're intended for small block Chevy engines fitted with either 1996 and later cast iron Vortec heads or Edelbrock E-Tec aluminum heads. Spread bore carburetors have 2 small venturis up front that are the primaries and 2 larger secondaries on the rear of the carb. com FREE DELIVERY possible on eligible purchases Edelbrock 2696 Four-Hole Square-Bore to Spread-Bore Carburetor Adapter, Multi, One Size. Spread Bore Intakes. Show More. Spread bore** Vacuum for air cleaner, canister, power brakes, distributor, PCV, EGR The Holley 510-0-80555C carb fits spread bore intakes. Answered by: jshook Date published: 2024-04-18 Carters’ first spread-bore carburetor of their own design (remember, they produced Q-Jets under license from GM), the first production came in two sizes: 850 CFM and 1000 CFM. Double The Edelbrock Four-Hole Square-Bore to Spread-Bore Carburetor Adapter allows proper installation of carburetor to manifold. Thank you . Estimated Ship Date: TodayLoading Estimated Ship Date: Today. Double Pumper carburetors are an American icon when it comes to performance carburetors. Holley Replacement Carburetors are Engineering to Improve Performance and Keep You Emission Legal. It has been around for a long time and many people believe it to be the best type of carburetor. According to Demon, it will support 350 hp. facebook. rickysiggy Discussion starter 206 posts · Joined 2024 Add to quote; Only show this user #1 · Jul 1, 2024. Find Holley Carburetors 650 CFM, Electric Choke and get Free Shipping on Orders Over $109 at Summit Racing! $5 Off Your $100 Mobile App 4-barrel, Square Bore, Electric Choke, Mechanical Secondaries, Dual Inlet, Black and Polished Finish, Each. $89. com FREE DELIVERY possible on eligible purchases. 7 out of 5 stars 15. The secondary venturis dwarfs the primary, allowing the latter to function as its own two-barrel carburetor. More complete and better fitting. The odd shape of these intakes allows clearance for the larger secondary venturis found on spread-bore carburetors. Cataclean - Fuel and Exhaust System Cleaner. Edelbrock 2692 Carburetor Adapter, multi, one size. They're set up for either square-bore or spread-bore carburetors and produce power from idle to 5,500 rpm. 44 out of 5 stars. Carburetor Adapter, 2-Hole, Holley 2-Barrel Carburetor, Spread Bore Manifold, 1. 85in, Individual Venturi Ports 4. Edelbrock Carburetor Not really, go with it. com FREE DELIVERY possible on eligible purchases Holley offers various options to replace your square-bore (Quadrajet) carburetor for a Holley spread-bore carburetor. SKU: 24-84014 Category: Carburetors-Hi Perf. 800 CFM – Carter Thermoquad 9800 electric choke, GM linkage, for ‘spread bore’ manifolds. Thick, Kit. Estimated Ship Date: Monday 10/28/2024Loading Estimated Ship Date: Monday 10/28/2024. nonamenationals. Demon Carburetion Street Demon Carburetors 1904. Its optimized calibration and dual mounting pattern make it Run-Ready™ for a large variety of Holley Replacement Carburetors are engineering to improve performance and keep you emission legal. Carburetor, Quadrajet Stage 2, 750 cfm, 4-Barrel, Spread Bore, Single Inlet, Dichromate, Chevy Style, Each. Made of high quality parts made in the USA. Coast Guard safety standards. Part Number: JET-33004. Ford. 5 2 internal needle and seat assemblies 2 50 cc accelerator pumps 1 30 cc accelerator pump power valve gasket and all assorted gaskets and clips Holley List # 6262 and #6210. This carburetor has a part number of R6497 LIST 6497 and used on 650 Spread bore . Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Mechanical Secondary 650 cfm Carburetor & Kit. If you flip them over the difference is real evident. This design, which features four barrels, is more of a "spread bore" carburetor. USED Holley List 6210-3 650 CFM carburetor, Date code 2164. Best to avoid it. Description Additional information Description. Holley Street Warrior 600 cfm Square Bore 4160 4BBL Carburetor - 080457S Carburetor Spacer 2696 Edelbrock Carter Four-Hole Square-Bore to Spread-Bore Aluminum Carburetor Adapter for Stock Quadrajet & Thermo-Quad Manifold Base 0. Lucas Oil 10302 - Fuel Stabilizer 15oz Bottle $10. (Check out the AED 4165 for the Spread Bore Double Pumper Carb rebuild kit) Possible Holley Spread Bore carburetor list numbers (Contact us if you are unsure of your application): Holley R-6926, R-7002, R-8276, R-8302, R-8546, R-8679, R-8700, R-8879, 80555, 80555C; Carburetor Adapter, Open Center, Spread Bore Carb To Square Bore 4-Barrel Manifold, 0. Universal Fitment. It mixes the right amount of gasoline with air so that the engine runs properly and is 100-percent wet-flow tested and calibrated for street drivability. The Holley 4165 spread bore is a suitable replacement carburetor for the 4300D. The wrap-around style air cleaners Find many great new & used options and get the best deals for Holley 800 CFM Spread Bore Rebuilt Carburetor #6211 Core Charge at the best online prices at eBay! Free shipping for many products! The Predator 6000 carburetor is adaptable to a variety of four-barrel applications by utilizing a base plate with fastener slots. 5. This design allowed for a smaller primary bore for improved fuel efficiency during normal driving conditions and a larger secondary bore that opened up when more power was needed, providing a seamless transition from cruising to full throttle. Find CHEVROLET Carburetors Spread bore Carburetor Flange and get Free Shipping on Orders Over $109 at Summit Racing! Shop the CLEARANCE SALE! 4-barrel, Spread Bore, Electric Choke, Vacuum Secondaries, Single Inlet, Gold Finish, Straight-leg Booster, Each. Gasket 3406. Throttle Bore; Gold Dichromate Finish; If we take a look at this Holley spread-bore carburetor you’ll notice that the front holes or primary venturis are smaller in diameter compared to the rear or secondary holes. If choosing a street Once you have completed your cfm calculations and know the carburetor cfm value you will need to determine whether your intake manifold requires a spread-bore (seen here to the left) or square-bore carburetor Holley Replacement Carburetors are engineering to improve performance and keep you emission legal. Summit Racing™ Carburetor Adapter Plates SUM-G1420 SUM-G1420. 99 +$28. Part Number: PQX-4228331 Not Yet Reviewed Carburetor, Streetmaster Quadrajet Stage 3, 700-799 cfm, 4-barrel, Spread Bore, Single Inlet, Chevy, Big Block. Surprisingly, the most common problem with getting a carb working Holley offers various options to replace your square-bore (Quadrajet) carburetor for a Holley spread-bore carburetor. S. 110 Inch Needle And Seats/ Needle And Seat Nuts And Screws/ Nylon Bowl Screw Gaskets/ Nylon Needle And Seat Gaskets. Hopefully this guide shares a little insight onto how Holley carburetors are identified, as always you can contact our Technical Service department at the toll free number above. Remanufactured Holley 4011 Spread Bore carburetor. The spread-bore design allowed the 4165/4175 Holley to bolt directly into place without an adapter. 76 shipping. If you’re considering replacing an older Quadrajet with a new Holley, consider the 4165/4175 spread-bore line of carburetors that employ the same mounting flange and similar throttle bore sizes. Estimated Ship Date: Monday 9/23/2024Loading Estimated Ship Date: Monday 9/23/2024. Fans & Accessories. Buy Edelbrock 1405 Performer 600 CFM Square Bore 4-Barrel Air Valve Secondary Manual Choke New Carburetor: Carburetors - Amazon. 75 : Spring Force: 5" Hg (Orange) Availability Note: Available to Order : Warranty: 12 Months : If you are not sure of what these bore size terms mean our previously mentioned link on carburetor literature will help provide the proper carburetor education you seek; but in a nutshell a spread-bore carburetor A spread-bore by design, the Quadrajet is particularly effective in street form, with small primaries that offer exceptional throttle response, yet good fuel economy, while its large air valve-controlled secondaries have the ability to deliver maximum, “seat-of-the-pants” performance in an instant. Holley Double Pumper® carburetors are a perfect performance upgrade for hot street cars and race vehicles. Ratings and Reviews. 19. item 2 Holley 6772, 650cfm 4bbl. item 2 Holley LIST 6210 4 Barrel 650 CFM Double Pumper Spread Bore Carburetor Holley LIST 6210 4 Barrel 650 CFM Double Pumper Spread Bore Carburetor. 100% wet-flow tested by Holley technicians to assure it arrives ready to run! Jet Performance Products specializes in turning ordinary Q-jet cores into race-ready carburetors. 99 1 bid 34m 11s. Summit Racing™ Carburetor Adapter Plates SUM-G1420. b. JEGS 100815 - -06AN Carburetor to As we mentioned, the Quadrajet is a spread-bore design carburetor, using 1-3/8″ primary bores and 2-1/4″ secondaries. This combination boosts torque over a wide rpm range, Carburetor Sealing Plate, Open Center, Spread Bore Carburetor to Spread Bore Manifold, 0. Selling AS/IS, and UNTESTED. The smaller primary bores give the carburetor better idling and low-load fuel economy. Spread bore carburetor. 39 $ 35. Holley Rebuilder Carb Rebuild Kit For 650 - 750 CFM Spread Bore Double Pumper. It is designed and calibrated for good street performance and fuel economy in 402 CID and larger engines with the Edelbrock Performer manifolds. The 4300D is very hard to find Carburetor, Quadrajet Stage 2, 750 cfm, 4-Barrel, Spread Bore, Single Inlet, Dichromate, Chevy Style, Each. Jump to Latest 2K views 32 replies 8 participants last post by rickysiggy Jul 14, 2024. 66. Description: Pontiac Quadrajet Carburetor Stage 2 800 CFM Electric Choke 4-Barrel Spread Bore Dichromate Finish Item #: JET-32102. Add to cart-Remove. com/l. 85 in. Custom ground cams See our products in the Vendor for Carburetors, Ultra Double Pumper, 650 cfm, 4-barrel, Square Bore, Electric Choke, Mechanical Secondaries, Dual Inlet, Black and Polished Finish, Each Part Number: HLY-0-76650BK 4. Estimated Ship Date: Feb 19, 2025 if ordered today. A square-bore 4 barrel carburetor has four like-sized throttle bores. See application chart below in tech Carburetor Base Plate Gaskets, Performance Carburetor Mounting Gaskets, 4-hole, 4-barrel, Spread Bore, Paper, Ford, Mercury, Pontiac, Stutz, Each Part Number: FEL-600611 5. Here you will find carburetor kits, floats and other related parts for the Holley 4175 carburetor. 0 out of 5 stars based on 3 product Intake Manifold, Performer Air Gap, Dual Plane, Aluminum, Natural, Square/Spread Bore, Chevy, Small Block, Each Part Number: EDL-2601 4. Specialty Carburetors. View All. Choke Parts. carb worked good at first but here is what it started doing: 1. floods a and black smoke. Write a review. Part Number: EDL-2692. 83 out of 5 stars. Scout II's with SV8 engines generally came with 2bbl carbs. I've even repaired carbs at run runs with a ball-point pen spring and a cereal box!I've got one on ever car I own--the one on my 37 coupe is frotm a late 70's--early 80's truck Buy Carburetor Spacer 2696 Edel-brock Carter Four-Hole Square-Bore to Spread-Bore Aluminum Carburetor Manifold Adapter 4-bbl Q-Jet Carb Adapter Plate Kit Replace for Stock QuadraJet & Thermo-Quad 0. The Edelbrock 350-1406 carb will bolt to a stock Ford square bore intake. 13. View Part. 10 offers from $59. It has a built-in fuel filter Mounts square bore carburetors to spread bore carburetor flanges. 4300A, 441 CFM (1967-1969) 4300A, 600 CFM (1968-1974) 4300D, 715 CFM spreadbore (1971-1974) The 4300 used the same thermostat as the 2150 electric and the 2100 non electric. Unlike the typical square-bore carburetors where the venturi and throttle bores are of similar sizes, the Quadrajet has smaller primary bores paired with larger secondary bores. $31. List # 6708 & 6709 only. spread-bore replacement carburetor Vacuum 650 Power Valve Blow Out Protection NOTE: The 0-80555C is designed to fit GM spread bore passenger car and light truck applications. Missing it's choke plate assembly, throttle linkage moves freely, being sold as parts, restoration, rebuild, core. All our remanufacturing processes are carried out in house in our dedicated facilities. Gold Dichromate finish for corrosion resistance and classic Holley looks; Performance replacement for Q-Jet carbs (spread bore bolt pattern) Universal calibration for easy bolt-on performance Holley Replacement Carburetors are engineering to improve performance and keep you emission legal. Carburetor Adapter Plate - Clear Anodized Billet. Answered by: jshook. Specifications: 1/16″ Thickness; Adapts Square Bore Carbs to Spread Bore Intake Flanges; Includes Gaskets; Important Notes: HARDWARE SOLD SEPARATELY; Replacement Parts: Adapter Plate Only: R1100Z; Gaskets: R2069 RPC spread bore dual plane intake manifolds add performance, improved throttle response and increased torque to your 1955-1995 SBC 265-283-302-327-350-400 V8 engines. 4300 Carburetor Kits. 99. Note that this math was prefaced by the term O. The Model 4175 carburetors a Demon Carburetors. 75 out of 5 stars ( 255 ) Find CHEVROLET 5. Calibrated for maximum fuel economy, the 1406 Edelbrock carburetor is suggested for most Performer applications. 95 out of 5 stars In 1971, Holley introduced the Model 4165/4175 spread-bore carburetors designed to be a better performing replacement for the factory installed Quadra-Jet. The spread bore carburetor is a newer type of carburetor that some people think is better than the square bore. The spread bore/square bore flange accepts most non-EGR 4-bbl carburetors on the market and works with standard Holley 4175, 1976 8 cylinder 4 barrel spread bore carburetor rebuild kit. It allows the use of almost any carburetor on almost any intake, saving the hassle and expense of purchasing all new components when changing carburetors or intakes. Items You Need. $69. Price: $649. Adapts Holley Carbs To Q-Jet Base Or Q-Jet / Quadrajet To Holley Base With Open Center. Features: Gold Dichromate finish for corrosion resistance and classic Holley looks The Edelbrock Performer Square Bore Air Valve Secondary Manual Choke New Carburetor features a two-piece, all-aluminum construction for cooler operating temperatures and less warping. Thick, Each See More Specifications | Check the Fit. These new gaskets fit 4150 series 650 - 750 CFM Holley 4 barrel carbs with mechanical secondary, 1-1/2" primary and 1-3/4" secondary throttle bores and with removable jets in the secondary. Part# 17-89 . You can also perform a spread-bore to square-bore swap. Using smaller primaries spreadbore carburetors offer quicker throttle response and better fuel economy at low power settings (such as in-town driving) than squarebore carburetors. $35. See application chart below in tech resources for specific details. 69 : Spring Force: 5" Hg (Orange) Availability Note: Available to Order : Warranty: 3 Months : The carburetor is unaffected by engine backfires, which means that there are no power valves to blow out, and the rods can be changed in seconds without carburetor removal or fuel draining Didn't intend to start a Rochester vs Holley vs Edelbrock ruckus. Motorbike Fuel Supply Carb Rebuild Kit Square Bore Carburetor To Spread Bore Manifold Adapter Kit Carb Spacer Accessory Carburetor Kit. Products. 84. I have a 1971 Monte Carlo with a 402 Big Block. Edelbrock Carburetor Adapters 1106. The 0-6210 is a Model 4165™ Spread Bore designed to fit several applications. 95. 0 out of 5 stars The Edelbrock AVS2 Series #1906 is a satin-finished four-barrel carburetor with electric choke that is designed and calibrated for optimum street performance in engines that require an air Holley Replacement Carburetors are Engineered to Improve Performance and Keep You Emission Legal. Made out of high quality cast aluminum and available in satin, polished and black finishes. This is the 4300D on a 1973 351C-4V Cobra Jet. e. Carburetor Spacers, Tapered Combo Spacer, 1. JEGS 100500 - Carburetor Fuel Inlet AN Fittings -6 AN to 7/8"-20 $9. We’ve combined AVS2 technology with enhanced metering for better performance on those overland adventure trips Find Edelbrock Performer Intake Manifolds 4-barrel spread bore Carburetor Mounting and get Free Shipping on Orders Over $109 at Summit Racing! Edelbrock Performer intake manifolds are low-rise, dual-plane designs with patented runner tuning and a 180 degree firing order that you won't find with the competition. Autolite 4300 Metering Jets. The 0-6210 is a Model 4165™ Spread Bore designed to fit several Find Parts and Accessories spread bore carburetor KEYWORD and get Free Shipping on Orders Over $109 at Summit Racing! Incorrect Fuel Pressure. 85in; Individual Venturi Ports 30. 5 out of 5 stars. Will this Aluminum Carb Manifold Adapter #2696 Edelbrock Carter/AFB 4-Barrel Four-Hole Square-Bore to Spread-Bore Carburetor Spacer for stock Quadrajet & Thermo-Quad Base 0. Get it as soon as Tuesday, Oct 8. In fact, the Predator can be mounted in any direction with respect to the fuel bowl; i. Water Pumps and Accessories. Its single feed fuel inlet, Holley Replacement Carburetors are engineering to improve performance and keep you emission legal. The Carburetor Shop also Holley Vtg 6498 Spread Bore Carburetor 4 Barrel 650 CFM 0458 Code Double Pumper. Both the 4300A and 4300D are unique by virtue of having spread bore throttle plate designs Secondary throttle bore: 1-9/16" The 441 CFM carburetor was found to run too lean for the 390 CID Carburetor; The Edelbrock 1406 Performer Series 600 CFM electric choke carburetor is a precisely tuned, quality-built carburetor that can handle the rigors of daily driving while delivering consistent, reliable street performance from day to day. There are adapters that permit the use of a square-bore carburetor on a spread-bore intake manifold. You could use a 4300 on a square bore early intake or 80's truck intake or a used performer. 67 out of 5 stars. Part# 17-6. Get it as soon as Friday, Edelbrock 1405 Performer 600 CFM Square Bore 4-Barrel Air The spread-bore carburetor consists of two smaller primary bores and two larger secondary bores. The 4175 uses vacuum operated secondaries and was also available in the feedback version (computer controlled). I (watch the car chase scene in to live and die in LA for illustration). Buy Carburetor Spacer 2696 Edel-brock Carter Four-Hole Square-Bore to Spread-Bore Aluminum Carburetor Manifold Adapter 4-bbl Q-Jet Carb Adapter Plate Kit Replace for Stock QuadraJet & Thermo-Quad 0. Estimated Ship Date: TomorrowLoading Estimated Ship Date: Tomorrow. E. See application chart below in tech resources for specific Find Parts and Accessories spread bore carburetor KEYWORD and get Free Shipping on Orders Over $109 at Summit Racing! Holley's new all aluminum 0-80459SA carburetor is designed for the rodder who needs 750 CFM of airflow, but only wants a single fuel inlet or is building a 2 x 4 setup. 2 MB; Some parts are not legal for use in California or other states with similar laws / regulations Modal Header. JET Streetmaster Quadrajet Stage 2 Carburetors. Thickness, Aluminum, Black Anodized, 4-barrel 4150 Square Bore Carb Mounting, Each Part Number: SUM-210300 4. The issue is when you try to run a spread bore carb on a square bore manifold, especially with a divided plenum. Holley 4175 Spread Bore Carb. As we cannot replace these carburetors, sales are limited to the quantity on hand. Kijiji and ebay. Low Rise refers to the height of the intake. Generically speaking, why is it so easy today to find a new square bore carb but so very difficult to find a new spread bore? HOLLEY SPREAD BORE CARBURETOR $ 325. 125 in. Carburetor Adapter Spread Bore To Square item 4 Holley LIST 6210 4 Barrel 650 CFM Double Pumper Spread Bore Carburetor Holley LIST 6210 4 Barrel 650 CFM Double Pumper Spread Bore Carburetor. Motorcraft 4300 Springs. Carburettor & Manifold Packages. If trying to use a spread-bore carb on a square-bore manifold, we have 150 (limit of carb) primary plus 375 limit of manifold secondary; so our 750 CFM carb is now effectively a 525 CFM carb! The reverse (trying to use a square-bore carb on a spread-bore manifold) is also true. It is a used carb, but it looks real well taken care of. IMG-20200419-WA0006. From their roots as the premier carburetor on many factory muscle cars to powering thousands of vehicles across the finish line, the Double Pumper is a great choice Autolite 4300A Carburetor. Gold Dichromate finish for corrosion resistance and classic Holley looks This carburetor was originally designed by Carter as a replacement for GM spread-bore carburetors. Square bore intake manifolds match the square bore shape of the carburetor base and venturis. WEHRS Carburetor Adapters WM206100. Add To Cart. Spread bore carburetors have 2 small venturis up front that are the primaries and 2 larger secondaries on the rear The Rochester Quadrajet carburetor can still hold its own on the racing circuit with some minor adjustments and modifications - Circle Track Magazine while the Quadrajet is a spread-bore Holley 650 cfm 4-bbl Carburetors & Kit are Perfect Bolt-On Performance Replacements for Quadrajets. The 0-9895 is a Model 4175 Spread Bore designed to fit several applications. This design is ingenious for several reasons: The odd shape of these intakes allows clearance for the larger secondary venturis found on spread-bore carburetors. This carburetor was originally designed by Carter as a replacement for GM spread-bore carburetors. Parts Only. 3/4" Carburetor Adapter Holley to Quadrajet / Q-Jet Or Spreadbore This is For A BRAND NEWCast Aluminum Tapered Carburetor Adapter. fuel item 4 Parts Only 6210 Double Pumper Spread Bore Carb Chevy Pontiac Olds II9803 Parts Only 6210 Double Pumper Spread Bore Carb Chevy Pontiac Olds II9803. 4-BBL Q-jet Carb for Chevy Cars for 1966-1973 Chevy Chevrolet GMC Cadillac Fits 327 350 427 454 NOTE: Spread bore carburetors have been built with two types of main metering body and main body castings. In 1971, these racing units would be detuned for street use and an 800 CFM version was original equipment on Chrysler 340 engines. The Edelbrock 600CFM carburetor is made for small-block & small displacement big-block engines. Simply asked what is the major attraction of Any square bore carb over Any spread bore carb. The result is a significant boost in efficiency and economy over a square bore four-barrel. Get it as soon as Tuesday, Oct 29. Scotty J. Holley 650 CFM 4 barrel carburetor is designed to replace Rochester Quadra-Jet 4 barrel carburetors. Low Rise Intakes. Square Bore vs Spread Bore 596 KB; Edelbrock Carburetor FAQs 6. Typical four-barrel carburetors are set up as either square-bore or spread-bore designs. $9. 99 1 bid 14h 31m +$25. Welcome Guest My Account Order Status Wishlist (866)762-7527. Fixing Yesterday’s Mistakes. For Use With Holley 650-800 CFM Spread Bore Double Pumper Carburetors; With Accelerator Pump Squirter Check Valves/ Brass Idle Mixture Screws/ Fuel Inlet Gaskets/ High Flow 0. 24 offers from Carburetor; Street; Holley Replacement Carburetors are engineering to improve performance and keep you emission legal. Price is $400. AVS2 Off-Road Series Carburetors provide total fuel control when the going gets rough. 14 out of 5 stars ( 7 ) Change Carburetors With Ease. Part Number: HLY-0-76650BK. It was a heat issue that I couldn't lick even using a thick gasket. Gold Dichromate finish for corrosion resistance and classic Holley looks; Performance replacement for Q-Jet carbs (spread bore bolt pattern) Universal calibration for easy bolt-on performance Purchase a carburetor from top brands like Jet, Holley, Edelbrock, Demon, and JEGS. Ships from and sold by Amazon. See all 11 - listings for this product. Opens in a new window or tab. Ford V8; Rochester Quadrajet Carburetor 4 Barrel For Chevy Gmc 327 350 396 427 454 750cfm One kit covers Holley Vacuum Secondary Spreadbore Carbs: 650 , 800 cfm etc. The 0-80555C Holley Rebuilder Carb Rebuild Kit For 650 - 750 CFM Spread Bore Double Pumper. Edelbrock Marine Carburetors This 600 cfm, 4-barrel, square bore, electric choke Edelbrock Performer carburetor is calibrated specifically for marine applications, and complies with U. Attachments. 2" Aluminum Open 4 Brl Square Flange Carb Carburetor Spacer W/Gaskets Holley. It was a very responsive carb, but I could never keep the vacuum secondaries from sticking open when the motor got warm. The 0-9895 is a Model 4175™ Spread Bore designed to fit several applications. Inactive User spread-bore replacement carburetor Vacuum 650 Power Valve Blow Out Protection NOTE: The 0-80555C is designed to fit GM spread bore passenger car and light truck applications. Demon carburetors are designed for high-performance applications and come in various sizes and configurations. item 3 Vintage Holley List # 4777-2 Model 4150 650 CFM Double Pumper Barn Find Vintage Holley List # 4777-2 Model 4150 650 CFM Double Pumper Barn Find. This design makes the Predator a universal fit for both Holley square-flange and factory-type spread-bore applications. One of the most distinctive features of the Quadrajet is its spread-bore design. Divorced choke; Spread Bore *Not legal in California for street use on vehicles originally equipped with a 2-barrel carburetor for which there was no 4-barrel option **Installation on square flange manifolds requires square flange-to-spread bore adapter 720-1932. Part Number: JET-34003 3. About this item 【COMPATIBLE WITH】4 Barrel Spread Bore Carburetor for 1901R Rochester Quadrajet 4MV 4-BBL quadrajet carburetor parts, Compatible with 1966-1973 Chevy 327-454c. + RoyalAir Electric Choke Carburetor 1406 Performer 600 CFM Square Bore 4 This replacement street carburetor is engineered to improve performance and keep the emissions legal. Carburetor Sealing Plate, Open Center, Square Bore Carburetor, Spread Bore Manifold, . Motorcycle and Powersports. Estimated Ship Date: Today. Radiators and Accessories. Buy Rochester Quadrajet Carburetor 4MV Carb 4 Barrel Carburetor for 1906R 1904R, Fit for GM Chevrolet Chevy Cadillac 1980-1989 with 305-350c. $60. WEHRS Carburetor Adapters WM206100 Carburetors, Model 4175, 650 cfm, 4-barrel, Spread Bore, Electric Choke, Vacuum Secondaries, Single Inlet, Gold Finish, Straight-leg Booster, Each Part Number: HLY-0-9895 4. 59 $ 31. Hey guys , i have a friend who sent me these pics of his 455 , just cant figure out if its a spread or square bore carb from the pics? he wants to replace the carb . i, 1975-1979 Corvettes, 1968-1973 Chevy/GMC Trucks use 1901R. $119. 6%. Learn more. If you happen to find a manifold you like but it’s not available for your particular carburetor, there are plenty adapters available to mount a square bore carb to a spread-bore intake and vise versa. Gold Dichromate finish for corrosion resistance and classic Holley looks Carburetor to Quadrajet (Spread Bore) Bolt Pattern with. You can find these Eddy #1407 750 carbs in near new condition for as little as $100 in Craiglist. Holley carburetor refurbished vacuum secondary 4011 model 84014. The ingenious aspect of the Street Demon is, by using the three-barrel goggle These spread-bore carbs are manufactured by Weber, USA, and are stock replacement parts for Chevrolet and GMC vehicles for which the Q-jet was available originally. Estimated Ship Date: Oct 3, 2024 if The Spread-Bore Design. 1 product rating - Holley Vtg 6498 Spread Bore Carburetor 4 Barrel 650 CFM 0458 Code Double Pumper. A spread bore carb has two small primary venturis and two much larger secondary venturies. 45. Pindex Carburetor Gaskets 1932 4-Barrel to 4-Barrel Carburetor Gasket Kit 526. They make manifolds for both square and spread bore carbs, and some of them perform almost as well as the factory cast Find many great new & used options and get the best deals for Holley List 6210-3 4 Barrel 650 CFM Double Pumper Spread Bore Carburetor Hc7 at the best online prices at eBay! Free shipping for many products! Spread Bore. . Original air cleaners do NOT always fit, as the TQ has 2 large bowl areas (one on either side), and the original carburetor had one bowl area in the front. The carburetor also had a vacuum secondary system, which provided additional fuel when the engine was under heavy load, such as during acceleration. Carburetor and Manifold Combos. 7 out of 5 stars based on 3 product ratings. item 1 HOT ROD HOLLEY 8679 4175 650 CFM VACUUM SECONDARY SPREAD BORE CARBURETOR HOT ROD HOLLEY 8679 4175 650 CFM VACUUM SECONDARY SPREAD BORE CARBURETOR . Low rise is a general term used to describe intake manifolds. It could also be used to replace for Carburetor and Manifold Combos. In most cases, it will bolt on to the original manifold. Remanufactured Genuine Holley 650 CFM Carburettor 4 Barrel, Spread Bore pattern . Billet Carburetor Adapter Plate for 2bbl 2300 Series models (0-4412) to a 4150 Square Bore manifold - Clear Anodized. 66 $ 14. I paid a guy in Southern California, Sean Murphy induction, to rebuild a carburetor for me, and he dialed it in for my engine. from die-cast aluminum, the JEGS Carburetor Adapter allows installing a square flange carburetor onto a spread bore manifold. C3 Tech/Performance - holley spreadbore vs real qjet - I am still doing my carb homework and research, I had been guilty in the past of dismissing the holley spreadbore qjet replacment after seeing many posts on the net calling them junk, But i know how that goes so how about feedback from People who have messed with Find many great new & used options and get the best deals for Holley R84021 Spread Bore Dual Feed Carburetor 4 Barrel 650 CFM Carb 4011 at the best online prices at eBay! Free shipping for many products! This design, which features four barrels, is more of a "spread bore" carburetor. Learn More. Holden V8; Holden 6 Cyl. com FREE DELIVERY possible on eligible purchases The Edelbrock Square-bore carburetor to Spread-bore Manifold Adapter number 2696 is designed to allow installation of the Edelbrock Performer Series carburetor on vehicles with the OE (original equipment) spread-bore intake manifold (typically GM vehicles that were originally equipped with the Rochester Quadra jet carburetor). Out of stock. Any sufficiently advanced technology is indistinguishable from magic - FITS spread bore and Quadrajet carburetors ; RESISTS heat and chemicals and is made from durable nitrile rubber compound with reinforced cellulose fibers ; 4-HOLE STYLE to accommodate most applications ; MADE IN USA with high quality components and assembly ; 1 PER PACKAGE with other sizes and styles available separately › See more product With our carburetor cfm calculator, we will prevent you from ruining your engine. 3 out of 5 stars. Will ship USPS Large priority box. Part Number: SUM-G1420. Sell your spread bore carb and get a Edelbrock #1407 carb and a RPM vortec manifold. 95 out of 5 stars Carburetor; Street; A carburetor spacer could be required to clear certain components on stock applications such as the Mr. The Jegs 555-15440 can also be used to install a spread bore carburetor onto a square flange intake with an additional carb stud kit ARP 200-2413, sold separately. A square bore all four are the same size. I finally gave up on it and went with an old school 4175 which I still run 15 years later. 95 (2) Estimated to ship direct from manufacturer on 10/15/24, pending manufacturer availability. It could also be used to replace for This is an Autolite/Motorcraft 4300D spread-bore carburetor, which is similar to the Rochester Quadrajet and Holley spread-bore carburetors with very small primaries and huge secondaries with a focus on wide-open throttle performance. You can also perform a spread-bore to s This is the 715-cfm 4300D spread bore carburetor for the Boss 351, 351C-4V High Output, and the 351C-4V Cobra Jet. JET Streetmaster Quadrajet Stage 2 carburetors have all the same great attributes of JET's Stage 1 versions—plus the additional benefits of fully recalibrated idle, off idle, main, accelerator pump, and high-speed circuits to match any modifications done to the engine, such as the intake manifold, headers, ignition, or mild This is a spread-bore carburetor, the Carter Thermoquad that was used as original equipment on the Mopar 340's. We offer a variety of new carburetors for sale that range from 2 to 4 barrels. Chev; Holden. 3 product ratings . #10 11-11-2008, 03:46 PM dodger1. 4300 Gaskets. jpg. Double Pumper, Spread Bore, No Choke Carburetor Holley 6772, 650cfm 4bbl. This carb is a spread bore with square flange bolt pattern. Notice that the secondaries are much larger than the primaries, requiring larger holes in the intake manifold for the rear secondary throttle plates. 4L/454 Intake Manifolds, Carbureted 4-barrel spread bore Carburetor Mounting and get Free Shipping on Orders Over $109 at Summit Racing! Shop the CLEARANCE SALE! Vehicle/Engine Search Vehicle/Engine Search Make/Model Search Holley Carburetor, Replacement, 650 cfm, 4-Barrel, Spread Bore, Electric Choke, Single Inlet, Dichromate, GM, Each CFM: 650 Fuel Category: Gasoline Remanufactured: No Number of Barrels: 4 Carburetor Flange: Spread bore Choke: Electric Secondary Type: Vacuum Fuel Inlet: Single Primary Jet Size: 62 Primary Power Valve (H Please see the charts and guides tab for a comparison of square bore vs spread bore. manifold. 4. No Choke **Please note these carburettors are currently built to order, feel free to contact us for handling time upon or prior to placing your order**. i Engine Vacuum Secondary 600 650 750 CFM Electric Choke Carb: Carburetors Spread Bore: Fuel Type: Electric: About this item Edelbrock 2696 Four-Hole Square-Bore to Spread-Bore Carburetor Adapter, Multi, One Size. Filters and Hose. Don't even care that Q-Jets may or may not be inferior to others. They are great for street rods, engine swaps, or industrial applications. EDELBROCK CARBURETOR ADAPTOR PLATE SQUARE BORE TO SPREAD BORE MANIFOLDS quantity. List number 84014 Quadra jet replacement carburetor. This replacement street carburetor is engineered to improve performance and keep the emissions legal. It has been used in cars like the Dodge Viper, which has I had a new 4011 vacuum secondary spread bore. Holley marine carburetor Holley Replacement Carburetors are Engineering to Improve Performance and Keep You Emission Legal. The Autolite 4300 was a Ford (also used by AMC) 4100 model, and were later superseded by the Motorcraft 4350. Bore Diameter: Primary Bore 1. 44; Secondary Bore 1. Carburetors (also known as "carburettor" in some countries, or simply "carb") are a smart device that create the correct mix of air-fuel in item 5 Holley LIST 6210-2 4 Barrel 650 CFM Double Pumper Spread Bore Carburetor Holley LIST 6210-2 4 Barrel 650 CFM Double Pumper Spread Bore Carburetor. The secondary kicks in when more power is needed. In Stock. Part Number: JET-35002 3. This Carburetor adaptor is designed to easily adapt Holley, Edelbrock, or Carter/AFB 4-barrel sqaure bore carburetors to Quadrajet / If you look at the Metering Block on the Primary Side (right side of the carb in the picture) you will see that the Metering Block has the normal spread-bore "reverse idle" circuitry: Fixed Idle Fuel Restriction and adjustable Idle Air Circuit. $45. : Spacers & Adapters - Amazon. esp vmjom xqcud ydd pqaefz qbesi eyjzj hdiij ajlza ldoku