View Single Post
      04-13-2011, 08:39 PM   #2
asdfjkldsa1
Private
8
Rep
64
Posts

Drives: 2011 E90 Sedan
Join Date: Jan 2011
Location: SoCal

iTrader: (1)

That's normal. I'm not sure if this is the exact reason but there is a valve on the left exhaust that opens and closes the left exhausts at times. If you pull out the cable that connects the power to that valve, the left will remain open 24/7 and you should have even exhaust buildup on each side. This also makes it nicer sounding. There's a guide in the diy section.
Appreciate 0