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Legality of Longtubes

This is a discussion on Legality of Longtubes within the External Engine forums, part of the LSx Technical Help Section category; This question is just to for me to make sure i am completely right. Are longtube emission styled headers w/ ...

  1. #1
    Member Jon7I2's Avatar
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    Legality of Longtubes

    This question is just to for me to make sure i am completely right. Are longtube emission styled headers w/ cats legal in IL? I am 99% sure that the emissions 1's are. However, i have a friend that insists that they are illegal. I just want to know for sure, so i can throw this site in his face when you guys prove me right.

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    pewter
    2001 z28 lingenfelter 383

    i THINK in most states if not all it is ILLIGAL to relocate the cats in any way but whos really gonnna notice or care when they do your inspection as long as there there?? ..i easily could be wrong though.just what ive heard

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    I'd post in the midwest section, or www.mfba.org for some local info. I live in the land of no emissions checks.

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    member since may 2000 nhraformula's Avatar
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    it is not legal. moving the cats from stock point.
    i passed il emissions cas they didnt look. they just hooked me up to odb.
    if they would of looked or smelled my exhaust fumes from the cam and headers, i would of been so fucked.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

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    pewter
    2001 z28 lingenfelter 383

    ok here we go guys.....this is what LPE said when i asked them about headers on my car and y they didnt put them on the car


    Hi Tony,

    We looked into some long tubes for the F-bodys, but legally we weren't
    allowed to modify the emission systems on new vehicles
    (cats). Thus that is why we did not install LT headers on these
    vehicles. I would consider the Kooks long tube headers and Y pipe
    with cats for your combination. Price of the headers, cats and Y would
    be $1395.00. I would then take it to someone for a tune, to
    make sure everything stays safe. Just let me know if you would like a
    set!

    sincerely,



    Jeff Myers
    Lingenfelter Performance Engineering

    is that a good price for kooks btw???

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    Member Jon7I2's Avatar
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    so he said he would consider kooks and cats w/ y pipe, so does that make it legal then?

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    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by Jon7I2 View Post
    so he said he would consider kooks and cats w/ y pipe, so does that make it legal then?
    no. its still moved from the stock point.

    jon, go to speed inc www.ls1speed.com

    they will do whatever you want. they put on my long tubes, got rid of emissions and put in a catless y pipe.

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    Junior Member supermando's Avatar
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    As long as the cats are in there and you don't have any obvious leaks in the front, they will never check the location. Screw emissions anyway!

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