After looking into this deeper I gander that the SRT-6 exhaust is just a copy of the one on the SLK32.

The problem is that the SLK32 "upgrades include a high-flow low-back-pressure exhaust system" which means we will a ton of torque on the bottom end. It looks like our only choices for a catback system is going to be the Eisenhaus or Borla catback.

-marc