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      07-27-2013, 11:45 PM   #3
Second Lieutenant
Drives: 09 E93 M3 interlagos
Join Date: Jul 2013
Location: Reunion FL.

Posts: 223
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Originally Posted by Mike Benvo
Originally Posted by SlashM3
I'm buying a pair test pipes and was wondering if I could put a aftermarket x pipe also. And if I could would that be massive hp gain?
Depends on your definition of massive.
Well acm claims with test pipes tune and there exhaust mod I'm gaining 40 hp. So does a xpipe mean another 20?
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