Im not Steve, but for what its worth I just got my stock SLK32 tuned by Eurocharged today, night and day difference. They say 20hp and I believe them. Low end torque is very noticeable. Drives like a completely different car. The big thing that I noticed is the pedal sensitivity. I can tell you without exaggeration that if I were to drive it the same way I used to, I would be laying rubber everywhere. No more mushy pedal. A light tap and off she goes! Shift points have changed as well. Oh and $265 is the tune with the cable!