I've got the 1 3/4 too 1 7/8 to 3inch collector headers mated to a 3inch xpipe with the reduction to bolt to the 2.5inch catback. I made 460rwhp NA so that puts me at about 520-540ish flwhp. Just curious the guys that went from 2.5 to 3inch catbacks did it help?
Would like too here some real dyno gains.... Kinda thinking 2.5 is still enough for me but maybe some one can shed some light for me.
Would like too here some real dyno gains.... Kinda thinking 2.5 is still enough for me but maybe some one can shed some light for me.
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