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      09-25-2014, 07:25 PM   #97
Hoopumpers
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Quote:
Originally Posted by dmk08
So has anyone seen the RPI exhaust being sold in the vendor section? It's talking about 32whp from mid pipe and cat-back. Are any of these other systems seeing big gains?

http://f80.bimmerpost.com/forums/sho...5#post16689675
There are zero gains on these turbo engines from exhaust. If you remove cats, then for sure you get a performance improvement.

RPI claimed same on F10. We tested. Zero gains.