What is the best sounding Cat-Back System

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Originally posted by WeST
I would definitly say the HKS HP. Its only for NA (2.5" piping) but its by far the best system Ive ever heard for NA 240's. No rasptyness, just deep clean exhaust notes

hks hiper. it's great. i have it on my car and it sounds really good. very deep and like west said, clean. it's not loud, so it doesn't really attract that much attention. it just looks loud, hehe.