Unlock your cars power potential with MBH Motorsports performance software tuning. Perfect for the person looking for a little extra power or someone seeking to unlock the full potential of your C63. ECU maps have been designed and build with many hours on the dyno and street with custon calibrations that work amazing with MBH Motorsports long tube header system. Power gains are about 65hp and 40tq without our headers and about 120+ horsepower and 90tq+ with our headers.