Went to Active Autowerke and got the Cat-back today! Did before and after Dyno pulls.
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02-27-2010, 02:10 AM
Drives: 09 Jerez/ Black, E90 M3
Join Date: Nov 2009
Originally Posted by
So you are saying that you got 13 whp from just the muffler? Seems high...
Posted results, 13 WHP and 14 LB FT gained from the rear section, as you call a muffler.
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