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IPE Innotech Exhaust Owners: X-Pipe Question
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09-19-2013, 05:05 PM
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Brosef
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Drives: F90 M5
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I paired it with a challenge sport x-pipe. was the best of both worlds - very deep at low RPM's and really high pitched at high RPM's. but then with the valves closed, it was as quiet or more quiet than stock.
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