Thread: RESEARCH Exhaust System
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      11-25-2011, 09:19 PM   #888
Diokaef
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Drives: M235I 2015, 335i 2011
Join Date: Dec 2009
Location: TAMPA FL

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2008 Z4M Coupe  [6.33]
At night with windows closed and after headers were installed
AA headers plus DKF sec 1 St v1 and sec 2 Race mufflers.

inside with windows closed.

79DB idle, 101 at 6.5K rpm from 6 ft distance.
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