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      12-08-2012, 07:16 AM   #13
pbonsalb
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Drives: 08 E90 M3, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: Concord, NH

Posts: 1,497
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I'd like to see dyno results since claims vary widely. BMW claims no gains for its performance rear exhaust, AA claims around 10 hp, someone reported that Eisenmann Race was worth 15 rwhp, and Akra claims something like 3 rwhp, but I don't think I have seen any dyno tests.
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