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Quadrajet Performance Carburetors and Accessories

To view any of the parts listed below, simply click on the picture next to the part you are interested in! To see our Carburetor Tuning Guide Click Here.

Quadrajet Carburetors:

JET offers a wide range of Quadrajet Carburetors for your vehicle.

 

STAGE 1 - A Stage 1 Quadrajet starts 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 reassembled using the highest quality components with a new float, choke pull-off and bronze bushed throttle shafts. A Stage 1 is intended to restore factory stock performance.

STAGE 2 - A Stage 2 has all of the features of a Stage 1 plus features fully recalibrated idle, off idle, main, accelerator pump and high speed circuits to match any modifications done to the engine such as intake manifold, headers, ignition or mild cam change. A Stage 2 features improved idle quality, instant throttle response and maximum torque and horsepower for street-strip vehicles, tow vehicles, RV's and watercraft with modified engines.

STAGE 3 - A Stage 3 Quadrajet is intended for serious street-strip and race applications such a circle track and NHRA stock and super stock classes. An oversized .135 needle and seat assembly is the start to this fully modified race piece. Main well size is increased and balanced to assure proper top end, high RPM fuel flow. Extensive circuit modifications are performed to keep the fuel curve correct throughout the RPM range, to obtain clean idle quality and instant off the line response for consistent race winning performance.


Big Block Quadrajet Carburetors:

JET offers a wide range of JET Big Block Quadrajet Carburetors for your vehicle. We now offer a Quadrajet carburetor tuned for Chevy & GMC cars and trucks with 396 ci and larger modified big block engines. The carburetor is extensively reworked by increasing main well size and is balanced to assure 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. Includes a .135 needle and seat to ensure adequate fuel flow. The carburetor is designed for modified big block motors with a dual plane intake manifold, headers, 8.5-9.5:1 compression ratio and mild ported or aftermarket heads. Recommended cam specs: Duration @ .050 min 210 degrees, max 240 degrees and a lobe separation angle of 110-114 degrees.

Available as a complete unit or JET can rebuild your existing core.
  • 800 CFM Quadrajet custom built for big block engines 396 ci and up.
  • Comes complete with choke.
  • .135 needle and seat assembly
  • Instant off the line response
  • Main body refinished to factory color

Circle Track Quadrajet Carburetors:

JET offers a wide range of JET Circle Track Quadrajet Carburetors for your vehicle. We now offer a Quadrajet carburetor built exclusively for circle track racing. The carburetor is extensively reworked by increasing main well size and is balanced to assure high RPM fuel flow. Several circuit modifications are made for a richer fuel curve throughout the entire RPM range, particularly at wide open throttle. Includes a .135 needle and seat to ensure adequate fuel flow. The carburetor is designed for heavily modified 355-406ci small block motors with a single plane intake manifold, headers, 11.5:1 compression ratio and high flowing cylinder heads. Recommended cam specs: Duration @ .050 min 250 degrees plus, lift .525 plus.

Available as a complete unit or JET can rebuild your existing core.
  • 750 CFM Quadrajet custom built for modified small block motors 355-406ci
  • All choke hardware removed
  • Recommended use: 6500 RPM-Up
  • Instant off the line response
  • Built for extended high RPM operation
  • Main body refinished to factory color

  Quadrajet Rebuild Kit Quadrajet Rebuild Kits:

JET has released 2 new rebuild kits for Quadrajet carburetors. Part number 201003 is a complete, high quality rebuild kit for JET Performance Quadrajet part numbers 35001, 35002, 35003, 35004, 36002 and 36004. The kit will also work on any non-electronic M4 series Quadrajet.

Part number 201004 fits JET Performance Quadrajet part numbers 34001, 34002, 34003, 34005 and 34006. The kit will also rebuild any 1966-1978 4M series Quadrajet.

Both kits include complete needle and seat assembly, accelerator pump, fuel filter gasket, choke seals, body to base gasket, air horn gasket, carburetor to intake gasket and air cleaner gasket.
  • Both kits contain all gaskets and parts necessary for a complete high quality rebuild.
  • Restore lost horsepower caused by vacuum leaks and worn out parts.
  • No modifications to carburetor required.

Throttle Shaft Bushing Kits:

The JET throttle shaft bushing kits for Rochester and Holley carburetors will restore your throttle valve assembly to better than new tolerances. Using bronze bushings, the kits eliminate common problems such as vacuum leaks, inconsistent idle speeds and binding or sticking throttle. Kits include 16 bushings, 1 reamer and instructions.

Quadrajet Tuning Parts:

JET now offers performance tuning and replacement parts for Quadrajet carburetors. Custom tune your carburetor to match your engine for maximum performance or replace worn out parts to regain lost performance. Offered are the most frequently used primary rods, secondary rods, secondary rod hangers, primary jets and needle and seat assemblies.

JET does not provide specific tuning advice or tech support on these products. Please consult a GM shop manual or tuning guide for specific tuning information.

Quadrajet Floats:

JET now offers replacement floats for Quadrajet carburetors. Floats are made from nitrophyl, which absorbs fuel over time causing the floats to sink in the float bowl. This causes the carburetor to run rich, flood and affects idle quality.

JET Part number 201017 is a replacement float for JET Quadrajet carburetor part numbers 35001, 35002, 35003, 36001 and 36002. It is also a direct replacement float for all non-electronic M4 series Quadrajet carburetors.

JET Part number 201007 is a replacement float for JET Quadrajet carburetor part numbers 34001, 34002, 34005 and 34006. It is also a direct replacement float for all 1966-1978 4M series Quadrajet carburetors.

Quadrajet Electric Choke Kits:

JET has released two electric choke kits for Quadrajet carburetors. JET part number 201354 is a replacement electric choke thermostat only and fits all Quadrajets that came with an electric choke including all JET Quadrajet carburetors with an electric choke (35001, 35002, 36001, 36002.)

JET part number 201355 is a conversion kit that gives you all the parts necessary to convert a factory Quadrajet carburetor with a heat tube style choke to a simple to hook up, 12 volt electric choke. The kit includes the electric choke thermostat, choke hold downs, required screws, electrical connector, drill bit and tap for the conversion.

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