P31 package a must?
@ Bigsl55fan- I think the C63 is unique, you are given the same engine found in the higher up AMG cars but it is simply de-tuned. As long as you go with a reputable tuner all they are doing is simply unlocking the engine to what the higher up AMG cars have. IMO you are not pushing the limits of the engine with a conservative tune, you are simply upping the engine from a restricted say 80% power output of what it was designed for to 100% found in the SL63, E63, CLS63 act.
The Best of Mercedes & AMG
Sheep
I've looked at getting a Quaife lsd in the past. Quaife lists two lsd's that fit the C63 on their site: QDF9V and a (*heavy duty model) QDF9V-2, both for $1062.11. These applications fit a number of other AMG's as well.



