View Single Post
      06-20-2013, 08:21 PM   #20
flipm3
E46 + E90 + F80
192
Rep
2,894
Posts

Drives: E46 + E90 + F80
Join Date: Jul 2008
Location: Illinois

iTrader: (1)

Garage List
2009 BMW M3  [0.00]
2002 BMW M3  [0.00]
Quote:
Originally Posted by Rapture View Post
The Akra x-pipe is 2.25" piping. I believe the MRF x-pipe is 2.5" or greater. That is where A LOT of the power gains are made. I'm sure moving the X up helps a ton as well; Gintani has been doing that since the beginning and they have been making a ton of power from just their x-pipe as well.
2.25" ID?!?! I would have expected at the very least a 2.5" ID...

Good to know!!
__________________
F80 M3 DCT|Alpine White . Black Leather | My Build Thread
E90 M3 DCT|Melbourne Red . Speed Cloth | My Build Thread
E46 M3 6MT|Jet Black . Black Nappa Leather | My Build Thread
Appreciate 0