What Bolt On Mods Make Power!?!? E90 M3
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07-30-2012, 01:16 PM
BimmerPost Supporting Vendor
Drives: 2014 435I M-sport
Join Date: Dec 2011
Location: Miami Fl
I suggest going with our drop in filter, cat-less xpipe and tune to start.
X-pipe alone is good for 20 whp.
Here is a dyno with filter,pulley,tune and rear section only. (stock X-pipe)
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