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Thread: Cat delete

  1. #1
    Junior Member timowen1's Avatar
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    Mystic Teal Metallic
    2001 Trans Am

    Cat delete

    Is there anyone out there that makes a set of cat test pipes? I think it's illegal to sell them as cat delete pipes. I know some gut the cat but this still leaves a turbulant air flow which can still be restrictive as compared to a smooth straight through pipe. If no one sells these do you think there would be a market on ebay for them and what do you think they would be worth? They would be stainless, same as exhaust and a direct bolt on with o2 sensor
    mounts that simulators could be screwed into. I also know you could go to long tube headers but some run with stock exhaust or shortie headers.
    Nothing illegal you know just a test pipe.

  2. #2
    Senior Member 98TransAmWs-6's Avatar
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    98 TA WS6/ 01 C5 Corvette

    It's not illegal to sell them it's illegal to buy them and put them on a car that is used on the street. But so is removing your cats. I would personally buy some cheap stainless steel cats and gut them entirely. I have seen some test pipes up on ebay for like $100 each which is ridiculous. I definately see a market in making test pipes.

  3. #3
    11 years of bangin gears cammed goat's Avatar
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    If you go for deleting the cats, make sure you have your car tuned as there have been threads about check engine lights popping once the cats are gutted/removed.

  4. #4
    Senior Member 98TransAmWs-6's Avatar
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    Quote Originally Posted by cammed goat View Post
    If you go for deleting the cats, make sure you have your car tuned as there have been threads about check engine lights popping once the cats are gutted/removed.
    Or he could make mechanical O2 sims that place the plug away from the exhaust flow so it tricks the computer into thinking they are working like the stock cats so no code is thrown.

  5. #5
    Junior Member alex 00.SS's Avatar
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    Quote Originally Posted by 98TransAmWs-6 View Post
    Or he could make mechanical O2 sims that place the plug away from the exhaust flow so it tricks the computer into thinking they are working like the stock cats so no code is thrown.
    Hey bro what do u mean make mechanical o2 sims?

  6. #6
    Senior Member 98TransAmWs-6's Avatar
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    Quote Originally Posted by alex 00.SS View Post
    Hey bro what do u mean make mechanical o2 sims?
    You buy a pack of two 18mm spark plug anti-foulers and in one of them you drill it out to 1/2" and screw it into the other one then you screw them both into the O2 bung and then put the o2 sensor in. What it does is keeps it out of the flow of the exhaust so any exhaust readings it does get don't throw a code.

  7. #7
    Junior Member alex 00.SS's Avatar
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    Quote Originally Posted by 98TransAmWs-6 View Post
    You buy a pack of two 18mm spark plug anti-foulers and in one of them you drill it out to 1/2" and screw it into the other one then you screw them both into the O2 bung and then put the o2 sensor in. What it does is keeps it out of the flow of the exhaust so any exhaust readings it does get don't throw a code.
    Thank for the info bro:thumbup
    Last edited by alex 00.SS; 10-15-2010 at 09:35 PM.

  8. #8
    Member bryceslu's Avatar
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    Just find an exhaust shop in your area that doesnt care about not having cats...usually the worse looking the place the better. Shouldnt be more than $100 for them to weld up some pipes replacing your cats.

    Just tell them you need a couple pipes put in place oc your cats. if they say no then go to the next shop... or better yet just ask the guys who are doing the work...they sometimes dont give a shit what it is.

  9. #9
    Junior Member southpaw0314's Avatar
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    99 camaro

    Does anyone have a sound clip of what it sounds like without cats on stock manifolds?

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