Thread: Catalytic Converter Or Straight Pipe

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  1. #1 Catalytic Converter Or Straight Pipe 
    GT Level Member GrandPriest24's Avatar
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    Would turning it to a straight pipe help gas mileage and increase horsepower and what else would it do or is that just a lie?
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  2. #2 Re: Catalytic Converter Or Straight Pipe 
    GXP Level Member ctracer's Avatar
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    taking off your cat will give you a code. thats about it.
    07 Black GXP.
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  3. #3 Re: Catalytic Converter Or Straight Pipe 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Quote Originally Posted by ctracer View Post
    taking off your cat will give you a code. thats about it.
    Yeah, no. Cutting the cat out or straight piping the exhaust does nothing. You wont gain anything but some bleeding ears from the drone of the muffler-less exhaust.

    The cat converter is there for fueling on some of our cars, you cut it out, say goodbye to fuel economy. I don't know what kind of car you drive, but just leave it the way it is.

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  4. #4 Re: Catalytic Converter Or Straight Pipe 
    GT Level Member GrandPriest24's Avatar
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    thank you i drive a 2002 pontiac grand prix but yeah i will leave the cat on
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  5. #5 Re: Catalytic Converter Or Straight Pipe 
    GT Level Member bsharpminor's Avatar
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    Unless you're planning on going quick leave it there. If you take it out with the U-bend, you'll pick up a few ponies, but you'll have to tune out a check engine light code.
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  6. #6 Re: Catalytic Converter Or Straight Pipe 
    GTP Level Member smoke14's Avatar
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    Thread #6
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  7. #7 Re: Catalytic Converter Or Straight Pipe 
    GT Level Member GrandPriest24's Avatar
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    oh okay thanks man
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  8. #8 Re: Catalytic Converter Or Straight Pipe 
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    try going for a performance downpipe/highflow cat/u-bend delete combo for the best gains and money spent, you'll pick up the most noticable power from that, wont set off any check engine lights and with the stock catback it wont be all that much louder than stock
    97 GTP Coupe 3.4 Set up with supporting mods 190+k miles (daily driver)
    95 Cutlass Ciera L67 Swap with 3.0 Pulley XP cam Setup w/supporting mods (Project car)
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