BBC Exhaust port size
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BBC Exhaust port size

  1. #1
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    Default BBC Exhaust port size

    Trying to locate header gaskets for my 454/log manifold set up. Heads are 049's "oval" (square) port. I can find gaskets that are
    1.85 x 1.90 or 1.88 x 1.88. I can't find any tech data that tells me what I've got and I sure as hell can't measure worth a damn. Well, I can measure but the conversion fogs...I come up with something between 1 14/16 - 1 15/16 but the online calculator just rounds up/down Sure appreciate a little help.

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  3. #2
    Senior Member Mohavekid's Avatar
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    No need for a gasket on logs.

  4. #3
    Senior Member 2002CP19's Avatar
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    Quote Originally Posted by 1320 View Post
    Trying to locate header gaskets for my 454/log manifold set up. Heads are 049's "oval" (square) port. I can find gaskets that are
    1.85 x 1.90 or 1.88 x 1.88. I can't find any tech data that tells me what I've got and I sure as hell can't measure worth a damn. Well, I can measure but the conversion fogs...I come up with something between 1 14/16 - 1 15/16 but the online calculator just rounds up/down Sure appreciate a little help.
    1 14/16 = 1.875
    1 15/16 = 1.9375

    Hope this helps..
    Quote Originally Posted by schick View Post
    Hold it firmly on the ground, a few pelvic thrusts should do the trick. If not repeat till satisfied!

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  6. #4
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    Quote Originally Posted by 2002CP19 View Post
    1 14/16 = 1.875
    1 15/16 = 1.9375

    Hope this helps..
    Thank you very much.

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