Quadrajet Rebuild Kit Buying Guide

Choose your rebuild kit by the work you plan to do and the number on the carburetor. Our EZ Order kits are assembled for your specific Quadrajet. Start with the identification guide if you have not confirmed its stamped number.

Which kit fits your project?

KitL1: a basic refresh

KitL1 Quick EZ Quadrajet Rebuild Kit supplies the basic refresh components, including a float, fuel filter and spring, accelerator-pump assembly, needle and seat, gaskets and related small parts. It is the starting choice when your project calls for those rebuild items rather than the additional shaft, air-valve and calibration components in the larger kits.

KitL2: a more complete rebuild

KitL2 Pro EZ Quadrajet Rebuild Kit adds primary-shaft bronze bushings and throttle-blade screws, secondary air-valve cam, screws and tension spring, plus calibration parts as applicable. The product listing includes jets, primary rods, a power-piston spring and an APT access plug for internal-APT carburetors. Jets and primary rods are not supplied for CCC computer-controlled Quadrajets.

Plan for the installation work as well as the parts. Our assembly instructions show drilling for primary-shaft bushings and checking that the shafts and blades move freely afterward. The KitL2 product page recommends the primary shaft drill bit (PSdrillbit) and primary bushing driver (PRBUTL).

KitL3: rebuild and recalibration for a modified engine

KitL3 Quadrajet Rebuild & Recalibration Kit is intended for modified-engine applications such as higher compression, a larger camshaft or other performance changes. Along with rebuild and shaft/air-valve components, its listing includes application-sized idle tubes, down-channel restrictions, secondary rods and air-bleed restrictions if needed or requested.

Tell us about your engine changes when ordering. Primary-rod selection depends on the carburetor design; the listing specifies early external-APT “B” series applications. The CCC exclusion still applies: jets and primary rods are not supplied for computer-controlled Quadrajets. The product page also recommends PSdrillbit and PRBUTL for installation.

Confirm these details before ordering

  1. Read the actual carburetor number. Enter all seven or eight digits in the product's Quadrajet Carburetor Number field. Do not choose solely from the vehicle year or a similar-looking carburetor.
  2. Describe the current engine and modifications. Use the Specific Engine/Vehicle Modifications field to give the shop the application details requested. If you are unsure which kit or calibration applies, ask us before ordering.
  3. Review the complete current product contents. Supplied components depend on your carburetor and the selected kit. The linked product page is the reference for the full contents and recommended tools.
  4. Check separately sold components. Vacuum pull-offs and choke elements are sold separately; do not assume they are included in a rebuild kit.
  5. Review the custom-kit policy. These kits are assembled for your application and are non-refundable.

A kit supplies parts; the rebuild still needs careful assembly

Our illustrated Quadrajet kit installation instructions (PDF) walk through the base plate, air horn and main body. They show why a rebuild involves more than replacing gaskets: inspecting components, installing the selected parts, setting the float, and checking smooth operation of the throttle, air valves and choke.

Read the instructions before deciding which work you will take on. For model-specific instructions and measurements, use the 4MC/4MV, M4MC or E4MC/E4ME documents linked on our technical resources page. This buying guide does not replace the assembly instructions or your application's measurements.

Want the shop to do the work?

QB1 is our rebuild service for a carburetor you send to us. QB1c is the custom-built carburetor option with a core supplied by our shop. These services are separate from KitL1, KitL2 and KitL3 parts kits.

Watch and download before you choose