STX legal idea??
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This is a discussion on STX legal idea?? within the Motorsports Talk forums, part of the Community - Meet other Enthusiasts category; So i've been throwing around some ideas for an STX legal pipe and here's what I've come up with, tell ...

  1. #1
    Registered User NDGeist's Avatar
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    STX legal idea??

    So i've been throwing around some ideas for an STX legal pipe and here's what I've come up with, tell me why it won't work please.

    Option 1. Buy a 3" Catless Down-pipe, and 2 hi-flow cats from JEGS or the like, take it to metal shop at work, have them weld it in.

    Option 2. Buy the Helix Down-pipe(or something similar), which appears to have CEL issues, and then buy a single hi-flow cat from JEGS or the like, take it to metal shop at work, have them weld it in.

    I mean, currently the only proven option is $900. I could pick up a Helix catted for $329, a cat for $90-170, and pay $50 or two cases of beer to have it welded in for me. Looks like i stand to save massive cash.

    Cats I was looking at:
    http://www.jegs.com/webapp/wcs/store...53324_-1_10251

    http://www.jegs.com/webapp/wcs/store...63223_-1_10251

    http://www.jegs.com/webapp/wcs/store...50982_-1_10251

    It just seems to me that if our cars sound like they are inconsistant in passing, in my world, that means that you have a tolerance stackup or are very close to the edge of functionality, so adding a cat like I listed should get me to be in the clear.

    Plus, based on the DP that bigsky posted, and the pony-keg size cat he's got, i'm pretty sure i don't have to worry about how big of a cat i need to install.

    Edit: The other part to this, if needed, is i'm thinking of using a hole saw, cutting out the 02 bung, then making the same hole somewhere else, and moving the bung to the opening i just created.

    -Chip
    Last edited by NDGeist; 02-01-2008 at 08:09 PM. Reason: Brain doesn't work.

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  3. #2
    Registered User NDGeist's Avatar
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    no one?


  4. #3
    Moderator   Sasquatch's Avatar
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    I am by no means well versed in the Solo rules - the only requirement is one cat. STX here with a Cobb TBE.

    The Cobb cat is pretty small:

    Last edited by Sasquatch; 02-01-2008 at 05:21 PM.
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  5. #4
    Registered User wrx wagone's Avatar
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    Quote Originally Posted by NDGeist View Post
    Option 1. Buy a 3" Catless Up-pipe, and 2 hi-flow cats from JEGS or the like, take it to metal shop at work, have them weld it in.
    This won't work as the stock uppipe is like 2.25". Stay with a catless uppipe, you don't need a cat in there.

    For the rest, yeah that's fine. You'll just need to cross your fingers you don't throw a CEL with whatever you do.
    This message printed on 100% recycled electrons.

  6. #5
    Registered User NDGeist's Avatar
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    Crap... I meant Catless Downpipe... My bad.

    My thought is to gut my UP, but put an aftermarket cat or two into a catless DP...

    Damn typo.

  7. #6
    Moderating on the run! Big Sky WRX's Avatar
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    I think the idea will work- I'd get one of the cats near the oe #2 position (#1 being the uppipe) and the other near the oe #3 spot BUT instead of having the O2 sensor before the last cat like oe, I'd have it after

    again it's no guarantee, but I can't help but think that two properly operating cats would do the trick

    <--- still banking on one- albeit a big one
    "Simplify and add lightness." - Colin Chapman

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