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I'm afraid the test pipe will get me very noisy with the Dc cat back i remember you mentionning somewhat of a riceyer sound than that of mugens exhaust but i do wish to get a test pipe
well.....sometimes with speed comes sacrifice, but in this case, I'd agree with you, it will be a tad on the raspy side, but all things considered, it shouldn't be that bad, and actually if you go with a high flow cat, it probably won't be bad at all. Though I haven't had the DC cat back on my car to talk from experience. Though, one thing I can say is, dont run a Greddy Evo wtih no cat on your ITR, they sound mad raspy with no cat...
Unless your exhaust is really trashed you can actually get some money for your used ITR exhaust manifold (call it a header) and cat back. It is a nice, cheap upgrade for GSR owners. Post it in the classifieds at Honda-tech.com. That is also a great place to look for a used jrsc and other items.