Will a stock 05 sti downpipe fit on a 2004 wrx?
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This is a discussion on Will a stock 05 sti downpipe fit on a 2004 wrx? within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; Just wondering if a 2005 sti OE downpipe will fit on a 2004 wrx....

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    Will a stock 05 sti downpipe fit on a 2004 wrx?

    Just wondering if a 2005 sti OE downpipe will fit on a 2004 wrx.

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    Registered User teflon_jones's Avatar
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    Yes but why would you want to do it?
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    Quote Originally Posted by teflon_jones View Post
    Yes but why would you want to do it?
    Different part #'s so I'm not sure.

    The cat in my 2004 wrx probably needs to be replaced and I can get a used (under 1000 miles) 2005 sti downpipe for a lot less than the $800+ for a new OE one.

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    Probably needs to be replaced?
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    Registered User Phobic's Avatar
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    why not just go aftermarket for like 300 bucks?

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    Quote Originally Posted by Phobic View Post
    why not just go aftermarket for like 300 bucks?
    Tuning required.
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    I have another thread on here explaining all that's going on. Don't really want to mod/tune it right now. Just want to get the P0420 stuff taken care of and see if there's any other underlying issues. So far we've narrowed it down to either the pre-cat or down pipe cat. Car is 9 years old w/137000 miles on it so I don't mind using lightly used parts. Someone offered a used 05 sti downpipe with less than 1000 miles on it, just don't know if it will fit.

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    Registered User UEDan's Avatar
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    Re: Will a stock 05 sti downpipe fit on a 2004 wrx?

    STi downpipe is slightly larger than a WRX... wouldn't that eff with turbo dynamics?

    And a google search said they are different:
    http://forums.nasioc.com/forums/showthread.php?t=780726

    Again I'll play the catless card. Its cheaper and a tune should still throw codes for other underlining problems, minus the cat problems. Look at your other thread, flashing a cheap XPT tune with a cheap vagcom cable isn't hard. We'll walk you through it man.

    Posted from a fone.

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    Re: Will a stock 05 sti downpipe fit on a 2004 wrx?

    Yes it will likely require tuning.

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