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      12-03-2012, 01:54 PM   #4
demontwinz
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Drives: 335i e92
Join Date: Sep 2012
Location: Toronto

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an aftermarket exhaust is only for sound? It really doesn't add much HP. I believe 3-8 HP, depending on exhaust?

I have heard stock exhaust with c-less downpipes. I like that sounds. I just got these downpipes for reduce turbo lag and nicer sound.
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