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A1 head and A4 head

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    #1

    A1 head and A4 head

    I just finished swapping and engine on a cust cb, it had a hole on the block, now I'm taking the head out, wich is the a4 one, I have a A1 engine on my cb and I was wondering if there would b any performance gains if I use this head on my engine after I send it out to machine shop to get it checked and maybe ported.But in case I don't get it ported wold it make a difference.


    Also is it straight forward or will I need the intake manifold also?
    Tags: None
    #2
    A1 and A4 head is the same

    only A6 is different and that is in the Camshaft

    A4 have tubular exhaust manifold (take that and use it) (same style as aftermarket header)


    Intake manifold should fit perfectly fine since that all the same except for A6 (which is better-dual runner)

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      #3
      Alright, thanks.I thought I hit gold with that job.I'll have to save that exhaust manifold then and look forward to get an A6.

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        #4
        You don't even need the A6 head... just the cam. The valve springs are different too, but I've never known anyone to have trouble with them. if you get the A6 cam, you'll also want the A6 intake manifold and ECU.

        The F22A head flows very well. If you now have a spare head, send it out to get ported and polished. You'll see some nice gains by doing that. Add in a Bisimoto or Delta cam for even more.






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