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  1. #1
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    Default Where did you find a 5/8 inch vacuum cap?

    I'm trying to finish up with all the details from my header swap and this is really all I have left. Everywhere I go the biggest size they have is 3/8. I need one that is 5/8 for the outlet on the driver side of the intake manifold.

  2. #2

    Default

    might want to check some diesel shops. or just remove the fitting and plug it?

  3. #3

    BrianEsser
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    Most parts stores have them. Though they are marked as "Waterpump bypass block off plugs".

  4. #4
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    Default

    The only thing I can think of that big is the brake booster vacuum. Are you wanting to plug that?
    1995 Z28 SOLD M6, 330 rwhp/333 rwtq - Moroso CAI, 58mm TB, LT4 HOT kit, 30lb SVOs, EWP, MAC mids, stock catback

  5. #5
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    I don't know why I wrote what I did. I meant the air intake tube.
    1996 Trans Am- bolt ons

  6. #6
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    Default

    Dorman/Help makes a multi pack of larger vac. caps but call them radiator bypass caps.

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