View Single Post
      02-04-2013, 12:10 PM   #8
FogCityM3
Lieutenant Colonel
FogCityM3's Avatar
47
Rep
1,842
Posts

Drives: M3 (E90)
Join Date: Feb 2012
Location: San Francisco

iTrader: (0)

On the M3 GTS 4, exhaust is wrapped after the headers and just past the differential. Wonder if you're running cats, wrapping from the secondary cat-back past differential will help at all in moving gases quicker/more scavenging.