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  1. J

    Cats or no cats?

    I just bought a Corsa cat-back for my 2000 RT-10. I also picked up some high flow cats. I haven't put them on yet because I was trying to decide if I should have no cats at all. How much of a HP gain will I achieve having no cats vs. high flow cats? Will it be unbearably loud with no cats? If I...

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