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      12-20-2012, 10:00 PM   #3
Private First Class
Drives: 2008 E92 M3 Coupe
Join Date: Jun 2007
Location: Newcastle

Posts: 167
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.
ABC99G is offline   Australia
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