Blitzkrieg

Do some research in RS4 cylinder 3 burning up.

SlvrBullet Unloaded

Change 1
a switch was made from APR to AWE downpipes, I have seen both units in person and I agree the AWE pipes are superior and will flow more leading to higher power figures. How much power is gained from switching to AWE from APR downpipes? where would gains of this sort be realized? FYI a correctly designed Downpipe should have earlier boost response!

change 2
A switch from a velocimax to a 3.5 merge...I don't see much if any of an improvement here, I'd attribute the gains for this switch as none to marginal! In my testing and on my car I prefer to keep the exhaust seperate!

change 3
The exhaust manifolds, I have seen/felt the effects of these manifolds on audi as well as porsche and the gains are BIG and noticible from throttle tip in to redline! also take into account that turbo exhaust manifolding is Kenny's area of expertise so much so that he has done factory race fabrication for porsche/ferrari and mazda(rotary)! His designs work bottom line the exhaust manifolds improve the volumetric efficiency of the engine, this header design does it's job! Either way and not being a smartass here but the AWE downpipe/Exhaust Manifold is obviously vastly superior across its expanded powerband to the APR downpipe/Stock exhaust manifold, the only question now lies in the fact of what part/parts of the AWE system is responsible for these gains...and this is an area open to interpretation at this point!

Jason @ Streetwerke

I've installed and driven AWE headers. I know quite a bit about them.