xtyper

Anybody running either of these tunes and willing to share some feedback? Currently narrowed down my tuning choice to these two options, and looking for some independent customer feedback to help make my decision.

Thanks in advance!

sunkat

I have a 2011 E63 tuned by RENNtech and am very happy.
I'm not familiar with Kleemann; but what RENNtech has been able to do with the newer v8 bi-turbo, like yours, is simply incredible....833HP!!!

JumpinJim

I contacted renntech about their intermediate tune a week ago. Sadly they have no dynos of that tune so its an unknown. I eventually decided to go with kleemann as they have not had any of the cel or rough idle issues that renntech has.

AMG E Power

Why don't u guys just get the regular renntech tune with a step colder plugs ? The ppl in FL MB of Mia is A authorized dealer for renntech so ur covered with the warranty ! Also if u live in FL get a dyno tune from them, downpipes of ur choice and a trunk tank to keep iats down.

dr. ss

I personally recommend getting a custom tune on the street/dyno over a mail in.

vdubpower

have u dynoed your car and measured 833hp?