[Lambobimmer]

Originally Posted by nicknaz

thanks! interesting they claim less gains than jb4

Maybe but the Cobb is so much more driveable than JB4. I also raced other N54 JB4 cars at the dragstrip with similar mods and I never lost. Only lost to N54 cars running Meth and at 19psi.

Here is my Dyno from my 135i. With the Cobb E30 race map it would probably put down 400rwhp and 440tq. An upgraded suspension is a must if you are going to put this type of power on the Z4.