APC Ti muffler

tytanium said:
Not sure I agree, according to my butt dyno, i gained a marginal amount. Negligible, but noticeable.
I replaced the whole thing with a Greddy SP2, much better overall sound, and at least NOW there IS a noticeable performance gain...
 
ummm which sp2 did you buy? i hope it was the redesigned one because the old model yielded no gains at all...
 

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