Bimmerpost member dd1981 took videos to compare what his F30 335i sounded like before and after I putting on the M Performance, plus another video after breaking it in with 1000 miles. Listen to the actual difference in sound on these videos:
2012 BMW F30 335i Stock Exhaust. Warm Start.
With M Performance Exhaust, 2012 BMW F30 335i, Semi Warm Start and 4k Revs.
After 1000 miles.
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