List of LTH (Long Tube Headers) Manufacturers for C63?
did the work at my Dealership (james from ACG) No dyno time yet. But I can say that the car is much more responsive to the touch. It feels like I added a sprint booster. Barely touch the gas peddle and it's gone. Its like I just added a bunch of power. So as far as more power I don't know but as for drivabilaty it's like a different car very snappy and the Yellow triangle flashes way to easy now
Better than I expected and Very happy with it.
Tomorrow I will do some high speed runs and play with it a bit. So to answer the question I haven't retuned as of yet. It is just plug and play. Now, if I can get any more out of the ECU now that the TB's are installed I will ask my tunner. I think the car adapts the fuel for the more added air.. Car for some reason sounds different
very responsive too 
The Best of Mercedes & AMG
WOW it woke up the car even more.. Lets go racing . I know your new SL must be sweet..
A complete header-back exhaust lists for $9,351 (w/o flaps) or $10,335 (w/ flaps).
$2,970
CARW204C63LP - Connecting pipe from header to X pipe **Removed secondary Cats**
$1,180
CARW204C63XP - Rear X-pipe **removed resonator**
$1,665
CARW204C63ETS Rear mufflers with exhaust Flaps **removes rear exhaust mufflers
$4,520
CARW204C63ETS Rear mufflers without exhaust Flaps **removes rear exhaust mufflers
$3,536










