Coffman 4-bolt exhaust manifold
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  1. #1
    PWCToday Newbie Jakeevans420's Avatar
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    Coffman 4-bolt exhaust manifold

    Will trade for performance 650sx parts or $150 shipped to lower 48. Iím located in Eaton Rapids, mi if your local also.
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  2. #2
    PWCToday Newbie Jakeevans420's Avatar
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    Re: Coffman 4-bolt exhaust manifold


  3. #3
    PWCToday Newbie Jakeevans420's Avatar
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    Re: Coffman 4-bolt exhaust manifold

    125$ shipped

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    PWCToday Newbie Jakeevans420's Avatar
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    Re: Coffman 4-bolt exhaust manifold

    Bump

  5. #5
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    Re: Coffman 4-bolt exhaust manifold

    Whats so special about these over a stock one ported from group k?

  6. #6
    PWCToday Newbie Jakeevans420's Avatar
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    Re: Coffman 4-bolt exhaust manifold

    I’m not sure to be honest but they are very high quality and I believe the outlet is larger for aftermarket head pipes.

  7. #7
    PWCToday Guru imamachine's Avatar
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    Re: Coffman 4-bolt exhaust manifold

    Don't you sort of need the Coffman head pipe to go with this? Could be wrong but I'm not aware of any other common 4 bolt head pipes.
    Brappp!
    1989 300sx 1985 JS550(3)
    1988 X2 1997 Superjet

  8. #8
    PWCToday Newbie Jakeevans420's Avatar
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    Re: Coffman 4-bolt exhaust manifold

    Tbh I’m not sure I bought it by mistake and just trying to get some of my money back
    89 650sx - 2mil over mariner pistons, westcoast head 210psi, pipe mod + extended chamber with divided manifold, sudco 42, lightened flywheel, jetlyne scoop grate, ocean pro ride plate, 15.5 impeller, dual cooling....

  9. #9
    Frequent Poster nebraska650's Avatar
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    Re: Coffman 4-bolt exhaust manifold

    Yes you would need the Coffman 4 bolt head pipe for this to work. They are around just not common. I’ve read that this manifold and the 4 bolt headpipe is great on 750 swapped SX or X2’s as the outlet is bigger than 650 version.
    1986 300 - SBN 38
    1989 SX - Coffman / SXR cutback / 750 BP
    1991 SX - Solas
    1994 TS - Coffman / Solas / OP ride plate

  10. #10
    PWCToday Guru imamachine's Avatar
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    Re: Coffman 4-bolt exhaust manifold

    Quote Originally Posted by nebraska650 View Post
    Yes you would need the Coffman 4 bolt head pipe for this to work. They are around just not common. I’ve read that this manifold and the 4 bolt headpipe is great on 750 swapped SX or X2’s as the outlet is bigger than 650 version.
    I put one on my X2 and had to blister the hull to get it to fit. But yes, it's bigger than any of the other three bolt west coast, coffmans type stuff.
    Brappp!
    1989 300sx 1985 JS550(3)
    1988 X2 1997 Superjet

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