The nice thing about the SRT-6 is you guys are in the 11's and you have done nothing internal. Tune a pulley CAI. To a V8 they would make a face if you said I'm running an 11's with bolt ons on a stock motor. No Cams, No port work on the heads, no bigger valves, no headers..... 11's for a street car is really good, even on modified cars Induction or not. So the SRT is a great platform and I think once the heads come off some port work is done (maybe a port match on the exhaust manifolds) greater numbers should be seen and the tuners can tinker more on the dyno. Granted with the machine work will have to go to a Mercedes Machinest who knows there stuff not your local shop down the road that's used to doing fords and chevy's.