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Thread: B20A exhaust ports space

  1. #1

    carotman's Avatar
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    B20A exhaust ports spacing

    Anyone knows if the space between the exhaust ports is similar to the "regular" B series engine.

    I could get my hands on B20A5 flanges and I was wondering if I could just weld a header from a B18 or B16 to it...

    I know we can use a B20A5 header but it involves some cutting... and ther isn't much choice out there.

    http://pages.videotron.com/omus
    3geez member since July 12 2000

    I need these parts!
    https://www.3geez.com/forum/showthread.php?t=67742



  2. #2


    Join Date
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    Are you getting those flanges off ebay?

    Clicky Clicky

    I was thinking the same thing you are, and I am sure it could be done fairly easy. I've never actually measured the spacing on a B16/B18, but just the fact that they are similar in so many ways to our B20A's indicates it should not be that hard. If you have a local parts store you like, go ask to take a look at an exhaust gasket for one of those motors. Hell, ask them to pull out a B20A5 and a B18 and do a quick compare. I might do that this weekend if I get a chance.

    Gregg

  3. #3


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    I saw some thing on a prelude board but i dont think they ever found a flange that fit right. I tried an H22 before but i cant recall if the ports are the same or not cause i know the holes were off a bit. I can check when im back home cause i saved the H22 exh manifold gasket.

  4. #4

    carotman's Avatar
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    yeah I was looking at those Ebay flanges :)

    http://pages.videotron.com/omus
    3geez member since July 12 2000

    I need these parts!
    https://www.3geez.com/forum/showthread.php?t=67742

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