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Originally Posted by Biscuit
I am new with the B15 but...27hp gains from a upgraded exhaust seems a bit much. You may get about 5-10 whp...but I highly dout that you will get 27. But I dont know. I usually dont see much hp comin out of an aftermarket exhaust.
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I didnt say 27whp from an aftermarket exhaust i said 28.7 overall for all mods. please read posts carefully. thanks
Josh