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Old 01-22-2013, 09:52 AM
footprints. footprints. is offline
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Location: Santa Cruz, CA
 
Join Date: Jan 2013
Posts: 2
Mein Auto: 2013 535i
That was the beauty of the exhaust mod for my 335i...simply pull a plug from a harness accessible in the trunk and voila: instantly better sound. (ensured that both butterfly valves were always open) But if I ever got bored of the louder sound I could just plug it back in. I am hoping the 535i has a similar harness...just haven't bothered to look for it yet.
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