Quote:
Originally Posted by Icecreamtruk
Header then overpipe. Its there where the two cats are located. If you are worried about emissions or dont want to remove the cats, change only the front-pipe, otherwise, since you already would have a supercharger and require a tune anyways, its a good time to get a header with it.
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To clarify, there is no cat in the overpipe. The cats are in the header and front pipe, with a resonator in the mid pipe.