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Holley Sniper EFI Quadrajet self-tuning fuel injection systems are ideal replacements when you're tired of rebuilding the 50-plus-year-old Rochester Quadrajet (Q-jet) on your classic ride. They're the first bolt-on, spread-bore, EFI throttle-body systems not requiring any additional adapters, sealing plates, or intake manifold swaps. They retain the same great features as the 4150 Sniper EFI version (four 100 lbs.-hr. injectors; built-in timing control; high resolution 3.5 in. full color touchscreen; etc.). Their throttle body will support naturally aspirated power up to 500 hp. In addition, they offer multiple fuel inlet configurations that allow for a stock-appearing installation and fit most stock air cleaners. Modernize your Q-jet-powered classic vehicle with a Holley Sniper EFI Quadrajet self-tuning fuel injection system. They are offered individually or in Master kits with external fuel pressure regulator preset to 58.5 psi, 20 ft. of 3/8 in. Vapor Guard fuel hose, fuel pump, filters, necessary hardware, and bulkhead fitting to return fuel into the tank. Features, items, and specs: * Designed to deliver the signature "Rochester Roar" at wide-open throttle! * Throttle body-mounted ECU–no extra boxes to mount * Only 4 wiring connections required (battery positive and negative, switched ignition, and rpm) * Transmission provisions on throttle lever for TH350/TH400 and 200R4/700R4 * Universal throttle and transmission kick-down bracket * Brake booster adapter (if required) * Simple calibration wizard (answer a few questions about your engine and it creates the base map, then starts tuning on its own—no laptop required) * Internal fuel pressure regulator preset to 58.5 psi * 20 ft. of 3/8 in. Vapor Guard fuel hose * Fuel pump and filters * Necessary hardware and bulkhead fitting to return fuel to the tank * Genuine Bosch LSU 4.9 wide-band oxygen sensor provides real-time fuel map learning * OEM-style throttle position sensor (TPS) and idle air control (IAC) for years of dependable service * Clamp-on oxygen sensor kit ensures leak-free oxygen sensor installation with stainless steel T-bolt clamps and weld-ready oxygen sensor flange * United States Coast Guard approved (certified to ISO 8846, SAE J1171 requirements) * Available in three finishes--Classic Gold, Shiny, and Black Ceramic
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$1,649.95
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$1,949.95
$1,483.95
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$1,753.95
On Sale
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 cam change. With the JET Streetmaster Quadrajet Stage 2 carburetors, you can expect improved idle quality, and instant throttle response, along with maximum torque and horsepower for street/strip vehicles, tow vehicles, RVs, and watercraft with modified engines.
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$499.95
$449.96
On Sale
Jet Stage 3 Quadrajet carburetors are intended for serious street/strip and race applications such as Circle Track and NHRA Super Stock classes. An oversized 0.149 in. needle and seat assembly is the start to these fully modified race carburetors. Main well size is increased and balanced to ensure proper top-end, high-rpm fuel flow. The Stage 3 carburetors' extensive circuit modifications are performed to keep the fuel curve correct throughout the rpm range. They will help you to obtain clean idle quality and instant off-the-line response for consistent, race-winning performance.
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$499.95
$449.96
On Sale
JET Performance has released these Quadrajet carburetors for Chevy and GMC cars and trucks with 396 c.i.d. and larger modified big block engines. The carburetors are extensively reworked with an increased main well size and are balanced to ensure top-end high-rpm fuel flow. Several circuit modifications are made to keep the fuel curve correct throughout the entire rpm range and to keep consistent idle quality. The carburetors include a .149 in. needle and seat to ensure adequate fuel flow. They are designed for modified big block motors with dual plane intake manifolds, headers, an 8.5-9.5:1 compression ratio, and mild ported or aftermarket heads.
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$499.95
$449.96
On Sale
The JET Streetmaster Quadrajet Stage 1 carburetors start with a complete disassembly of the hand selected core, cleaning and inspection procedure. The casting plugs are sealed with epoxy to prevent leak-down into the intake manifold. All circuits are checked for proper sizing and the calibration is checked for proper jets, primary metering rods and secondary metering rods. The carburetor is then carefully reassembled using the highest quality components with a new float, choke pull-off and bronze brushed throttle shafts. Stage 1 Quadrajet carburetors are intended to restore factory stock performance. Not intended for engines with RV or performance type cams.
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$499.95
$449.96
SA Design's How to Rebuild and Modify Rochester Quadrajet Carburetors is a complete guide to selecting, rebuilding, and modifying the Q-Jet and is aimed at both musclecar restorers and racers. It includes a history of the Q-Jet, an explanation of how the carb works, tips on selecting and finding the right carb, instructions on how to rebuild the carb, and extensive descriptions of high performance modifications that will help anyone with a Q-Jet car to crush the competition.
( 16 )
$25.79
On Sale
JET Quadrajet bolt kits are designed to properly fit various Quadrajet and Rochester Quadrajet carburetors. They include two long bolts, two studs, and the accompanying washers and nuts. JET Quadrajet bolt kits are standard hex-style, stainless steel with a polished finish.
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$14.21
$12.79
On Sale
JET quadrajet bushing service kits will restore your throttle valve assembly to better than new tolerances. Using the supplied bronze bushings, they eliminate common vacuum leak problems, inconsistent idle speeds, and binding or sticking throttle. The kits contain 16 bushings, 1 drill bit reamer, 4 retaining screws and an instruction sheet.
( 2 )
$99.71
$89.74
On Sale
JET Quadrajet fuel filters are direct-fit, high-flow replacements designed to be part of your performance engine upgrade. The paper element material screens contaminants as small as 25 microns—that's about half the standard diameter of a human hair! These fine sifters are available in either short or long lengths. Make sure your engine is running clean with JET Quadrajet fuel filters. Order the style recommended for your vehicle.
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$6.71
$6.04
On Sale
Quadrajet carburetor electric choke thermostats from Jet Performance are replacement only. These quality components are designed to fit all Quadrajets that came with an electric choke, including the Jet Quadrajet carburetor models with an electric choke (35001, 35002, 36001, and 36002).
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$32.21
$28.99
On Sale
These JET Quadrajet metering rods install into your Rochester Quadrajet carburetor without any modifications. They are available in different sizes to allow for all engine types. Optimize your carburetor's flow with JET Quadrajet metering rods.
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$27.71
$24.94
On Sale
JET Quadrajet replacement floats are black, nitrophyl pairs intended for fuel chambers requiring side-hung floats. They're engineered to fit several JET Quadrajet models. The modular design also allows them to function as direct replacements for stock 4M-style (1966-1978), and non-electric modified M4-style Quadrajet carburetors. Include JET Quadrajet replacement floats as part of your high-quality rebuild project. Order the pair designed to fit your carb model.
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$18.94
$17.05
Tune any Q-Jet with Edelbrock secondary metering rods. These secondary metering rods will work on any year Quadrajet. The dimension indicates the tip diameter, not the shaft diameter.
Not Yet Reviewed
$45.95
On Sale
JET Quadrajet M4 series adjustable part throttle kits provide everything necessary for you to have easy access to the adjustable part throttle feature in your Rochester Quadrajet carburetor. They take approximately 30 minutes to install and allow you to adjust the part throttle setting on the primary metering rods. This can eliminate part throttle flat spots and off-the-line hesitation by simply turning a screw. The best part is, you don't have to take apart the carburetor every time you want to adjust the part throttle.
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$29.96
$26.96
Edelbrock metering jets will work on any Quadrajet, and allows you to tune your Q-Jet for performance or economy. Choose the size that works best on your application.
Not Yet Reviewed
$26.95
On Sale
Holley carburetor insulator gaskets are top notch when it comes to eliminating the heat transfer from your intake to your carb. These phenolic, heavy-duty gaskets also come with carb studs for a quick and easy installation.
( 7 )
$79.95
$71.96
Fine Lines fuel lines are pre-bent and flared with the correct threaded fittings which reduces your install time tremendously. Their tank to engine fuel lines run from the back of the vehicle to the front, and will either connect to the fuel pump at the motor or run directly to a fuel rail. The mild steel lines are Galphan coated for added protection, while their stainless steel lines are T304, but are of a special softer blend to help with any possible leaks. Fine Lines carries a wide variety of compatible lines (main, return, vapor lines, etc.) for different years, makes, and models, including classic cars. Choose the lines designed for your vehicle.
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$34.68
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$51.57
Edelbrock Pro-Flo Series air cleaners work with a variety of popular carburetors, including Performer Series, Thunder Series AVS, Holley, Thermo-Quad, Quadra Jet and Carter AFB, just to name a few. Knock-outs in the air cleaner base for use with Edelbrock crank case ventilation adapters (sold separately) are provided, depending on application. Pro-Flos offer multiple styles to match yours—and sizes for a proper fit. When you're looking for an ideal solution to your hood clearance problems, consider Edelbrock Pro-Flo Series air cleaners.
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$33.95
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$152.95
On Sale
PRW Q-Jet carburetors are manufactured with all new components. They are a significant upgrade to stock GM carburetors for most GM automotive applications. Every carburetor is designed with precision engineering and cutting-edge features and are equipped with PRW's industry first lean/rich adjustment allowing 15% +/- main circuit adjustment to allow for precise tuning with ease. They are available in 750 cfm for GM cars and trucks with engine sizes ranging from 283-350 cu. in. and 800 cfm for GM vehicles with engine sizes ranging from 350-455 cu. in.—both applications work well with a mild cam or headers for optimum street performance. Choose the PRW Q-Jet carburetor designed for your application needs. Key features: * All new—not rebuilt, or remanufactured * Available for 750 and 800 cfm applications * Industry first Lean/Rich adjustment allowing up to 15% +/- main circuit adjustment to allow for precise tuning with ease * Universal replacement for most GM automotive applications * Includes most required vacuum ports * Complete with a one-wire electric choke * Locally assembled and run-tested, with all gaskets, metering rods, jets and air bleeds made in the USA * Compatible with "C" and "U" style throttle linkages suitable for stock intake manifolds
Not Yet Reviewed
$699.89
$499.95
On Sale
Are you looking to upgrade your Quadrajet carburetor's choke from a heat tube style to an electric unit? If so, then these Jet electric choke conversion kits are exactly what you need. These kits include an electric choke thermostat, choke hold-downs, a drill bit, tap, and all other necessary hardware and electrical connectors to make for a complete installation. Get more convenience and reliability from your Quadrajet with these Jet electric choke conversion kits.
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$52.46
$47.21
On Sale
Restore lost horsepower caused by vacuum leaks or worn-out parts with one of these JET carburetor rebuild kits. Your carb regulates the precise amount of fuel and air to maximize engine performance, but sealing components need to be updated periodically. JET rebuild kits are available for a variety of carburetors, such as Holley, Quadrajet, and Rochester, and they include all parts needed for your specific make/model--gaskets, seals, O-rings, needle and seat assemblies, and accelerator pumps. Find the rebuild kit to match your carburetor specs, and experience the efficiency upgrade of JET Performance.
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$46.46
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$51.71
$41.81
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$46.54
On Sale
These Mr. Gasket chrome plated steel throttle cable brackets mount to the rear of your Holley, Edelbrock, AFB, Quadrajet, or inline dual carburetors. These brackets are used to mount your throttle cable and kickdown assemblies.
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$34.51
$21.55
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$33.66
Moroso carburetor work stands offer the ideal perch for you to service a vital engine part. Blending the proper amount of air and fuel to power your vehicle is a big responsibility, so you need to be able to reach every inch of the carburetor for fine-tuning. These cast aluminum stands are ideal for maintaining Quadrajets, as well as standard and spread-bore units from Holley. The specialty work stands feature an open center and four convenient mounting pegs. Mechanics and do-it-yourselfers, let Moroso make your job easier!
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$41.99
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$57.99
Edelbrock Q-Jet bolt kits are suited for all Quadrajets, except for model 1905. They include all of the bolts and hardware needed to mount your Performer Quadrajet to your intake manifold.
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$19.95
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