Holy cow, just took a ride in my friends SLK55 which he just got back from a Kleeman Supercharger/Headers/Cams install and the thing is insane. The torque from 1500rpm all the way to redline just overwhelms the traction control. The exhaust is thunderous and intoxicating, sound like pure evil. It is absolutely ridiculous. Kleeman says the standard supercharger install makes 550hp and the headers and cams make it 596hp. Next time he comes around, I'll stick the GoPro on to film it.