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Thread: Loose booster on 4500 Holley

  1. #1
    Senior Member DYNO OPERATOR
    Join Date
    Jan 2004
    central Illinois

    Loose booster on 4500 Holley

    I just noticed that one of my boosters is loose on my 9375 HP 4500 carb.

    What is the proper way to repair this?

    I know there are booster pins and even know where there are some pins, just don't know about fix.

  2. #2
    Senior Member RACING JUNKIE jmarksdragster's Avatar
    Join Date
    Jul 2007
    Try a 5/16 center punch, or a brass drift to set the booster pin tighter.
    Mark Whitener

    Good work isn't cheap, and cheap work can't be good.

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