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**JET** · 03-13-2014

Nope, stock exhaust is changed just for sound purposes only. Dual 2.4" (with a few neck downs but not bad) the whole way. DP gains 10-20hp from ditching the cat. That is the only worthwhile exhaust mod really for performance until you hit 500whp. With a hybrid turbo it would probably be worthwhile to ditch the mid pipe and secondary cat.

03-13-2014	#37
JET Is funding Exxon. Join Date: Oct 2003 Location: Ham Lake Drives: like a bat outta hell! Posts: 7,983	Re: JET's 335Xi Nope, stock exhaust is changed just for sound purposes only. Dual 2.4" (with a few neck downs but not bad) the whole way. DP gains 10-20hp from ditching the cat. That is the only worthwhile exhaust mod really for performance until you hit 500whp. With a hybrid turbo it would probably be worthwhile to ditch the mid pipe and secondary cat. __________________ Is burning corn and stayin' warm! My motorcycle is stock and reliable, my Talon is neither!