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      08-13-2012, 02:38 PM   #23
RobMCoupe
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Drives: 2007 Z4 M Coupe
Join Date: Feb 2010
Location: Bay Area

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These are Stromung. Slight drone around 2k when in wrong gear under load. Some complain it is loud. I like to hear exhaust note cause. It really sounds good during accel. Freeway cruising is about 20% louder than stock. You'll know it's there when you tap on the gas. Exhaust is always louder in coupe than roady.

I see if I have time to make an interior sound clip this week.

I had BMS exhaust prior to Stromung. The drone was unbearable.
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