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Header and exhaust sizing

Discussion in 'Civic and del Sol - EG and EK' started by Wookie_In_a_B16, Sep 7, 2006.

  1. Wookie_In_a_B16

    Wookie_In_a_B16 New Member

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    I currently have a 2.25' exhaust piping from the stock header back. I was looking at the ITR header as a replacement, but the collector is 2.5'. Would this cause a problem at all or would I have to modify it somehow?
     
  2. MoSeS

    MoSeS New Member

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    any good exhaust shop should be able to strech the metal on the piping for your exhaust
     
  3. greygoose

    greygoose Junior Member

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    Remember that header is made for a motor with 11:1 compression so if you are less than that I wouldn't put it on you might lose a pony or two. I have seen this happen before on the dyno so just thought i would share that with you
     
  4. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Just about every single B series engine will benefit from a 2.5" collector on the header in place of a 2.25".
     
  5. greygoose

    greygoose Junior Member

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    Not true with had a stock gsr with 10:1 compresssion with a jdm itr header and 2 1/4 exhaust and it dynoed 160whp then with a dc sports header dynoed 162whp. But if you are saying any header is better than stock then yes I agree with that. Just trying to understand you sir
     
  6. formby

    formby learning in progress

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    lol sir

    what he said was that almost all bseries engine will benefit from a 2.5" collector. i dont think he mentioned the header itself, just the collector part.

    lol sir
     
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