Quote:
Originally Posted by kevin1985912
now i'm starting to regret getting my FI catback, should have gone with a 3" exhaust. Might have to get the GTM 3" catback, and sell the FI catback if it doesn't make good power. 
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The biggest benefit of 3" over the 2.5" of course other than actual more peak power and torque is the spool up difference and mid range power gains.