Yeah I looked into this a little more and they are calling it "Clutch Buzz." This seemed to be more of a problem with the Ap1s so there was a recall on it whereby they installed a stronger clutch/ pressure plate I beleive. All ap2s have the fix in place. I do get a lot of resonance from my exhaust in low rpms when slowing down (rattle) but it has to do with the exhast -- sounds great when you are heavy on the throttle though.
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