i have it(dinan) on my F36 N20 ZF8 (Auto) and it drones at certain low rpm (1300, 1700, 2400) under load. other than that, i think it sounds pretty decent however it does not have the "snap, crackle, pop" that most people like.
if i were to do it again, i'd get the single side twin pipe or quad pipe offering from AWE or the M-Performance.
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