I am running a y-pipe form the headers to a single 2.25 pipe to a Magnaflow 14815 muffler on my '90 325i, the cat has been removed. Car sounds good except too much rasp and a little loud. Can I have a resonator installed to kill some noise and possibly some rasp? I have an autox upcoming and would hate to be disqualified for noise pollution.
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How to quiet down/derasp my exhaust
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