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    What are test pipes?

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    jesse
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    What are test pipes?

    Post  jesse on Sun Mar 08, 2009 3:35 pm

    Test pipes are straight-tube replacement pipes for your catalytic converters. Removing your cats is usually against the law, but that doesn't mean you will get "caught" necessarily. Test pipes will add a significant amount of horsepower by removing the restriction in your cats. They will also make your car sound MUCH louder.

    RESONATED test pipes are just regular old test pipes with some kind of resonating chamber which helps remove that "RASP" sound from your exhaust. The resonator does not have any performance benefit.

    Obviously, when you remove the cats, your car will no longer have any way to prevent releasing air pollution (NOx, carbon monoxide, unburned hydrocarbons). If you want the performance upgrade but are still somewhat concerned for the environment, go with HIGH FLOW CATS. (e.g. Kinetix, Ultimate Racing, Berk Technology, Fast Intentions). These will reduce pollution (although, not as well as your stock cats) but even HFC's are still not usually legal. HFCs have been shown to provide similar gains to test pipes.
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    Supa Ninja
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    Re: What are test pipes?

    Post  Supa Ninja on Wed Mar 11, 2009 2:34 pm

    HFC = no CEL
    test pipe = must use a defouler


    On a side note some magazine did some tests with running stock cats vs gutting the cats. turns out the gutted cats lost power over stock cats. who woulda thunk it?

      Current date/time is Wed Jan 16, 2019 5:26 pm