Thread: aFe MACH Force XP Race Pipe for BMW E9x M3. Has anyone installed this??
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      12-17-2013, 10:42 AM   #33
Dave07997S
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Quote:
Originally Posted by s4one View Post
Why do you say not to pair it with a MPE? This is what I have and am thinking of a test x pipe.
The rasp will be unbearable...If you do just the test pipes you still have the rear resonators which help with rasp.

Dave
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