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Did a little looking around on the web and couldn't find anywhere to buy a test pipe for an IS350. My buddy in an S2k had a million different options, I find it hard to believe that none of the companies that make exhausts for us decided not to make tests pipes. Or am I just stupid?
Do any companies make test pipes, or does it have to be a custom job?
and if anyone has thrown one on what will the gains be on a stock exhaust?