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      01-24-2013, 04:39 PM   #80
WWM3
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Drives: 09 E90 M3 AW/FR 6MT
Join Date: Mar 2009
Location: PA

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Quote:
Originally Posted by 09GT View Post
Agreed.
I was referring to adding test pipes.
ACM by itself should sound perfect (no rasp).
I had a WS6 with cutouts a long time ago (similar to straight pipes) no rasp at all.
Adding the test pipes to the ACM mod is what concerns me as well.