View Single Post
      12-20-2012, 11:00 PM   #3
ABC99G
Private First Class
Australia
2
Rep
167
Posts

Drives: 2008 E92 M3 Coupe
Join Date: Jun 2007
Location: Newcastle

iTrader: (2)

I lost about 17kw (23HP) between 20" and 19"
Same dyno, different day. My car is stock except for exhaust.
That should give you an idea.