3/8″ Throttle Shaft Bushing Kit


In case if you do not know the Carb number then enter 1234 in the Carb number textbox.

Category Tag

The Quadrajet Throttle Shaft Bushing installation kit for ALL carburetors with 3/8″ throttle shafts. Corrects air leaks at throttle shafts which can cause running issues and unfiltered air to enter your engine.

Works on all Quadrajet carburetors 3/8″ secondary throttle shafts.

Will also work on most Holley carburetors with 3/8″ throttle shafts, Carter, Ford, and many TBI’s.

This is a DIY kit, very easy to use and no drill press is required. Much more accurate than the “dead pilot” method as the bit is self guiding and follows the bore to keep the bushings on center. All that you need is a hand drill, shop vise, couple of wooden blocks or soft jaws, small file and screwdriver.

Additional Information

Weight 1 lbs
Part Number



This kit contains:
A custom machined self guiding drill bit with stop collar.
Four oil impregnated bronze bushings.
Sixteen #3-48 shaft screws (Q-jet), Sixteen #8-32 shaft screws (Holley), and Sixteen 16 #6-32 shaft screws (most others).
A driver for the bushings, loctite and instructions.

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