Unfortunately we did not get to do dyno testing on the E70 as we were very limited for time (customer needed the vehicle back). I can not say with any proof that there are gains for this system. As I am new here and no one really knows me yet, I will NOT bs you in any way, last thing I want is anyone questioning my integrity. The way I see it is your integrity is like your virginity...you will loose it once....

We did a system on an E53 and there was 4HP and 22FPTQ gain, we have proof (dyno befor and after) of that on the E53 forum (I posted it there)

The major difference is the sound quality that changed dramatically.