[Hoopumpers]

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.