M6 has: Evosport pulley Evosport ECU upgrade removed carbon filter removed pre-cat and it dynoed 476 at the wheels CL65 AMG has: Evotech ECU/TCU Round 1 (CL65 had traction "on" and did not downshift) http://www.youtube.com/watch?v=roaAudvRads Round 2 (CL65 had traction control "off" and downshifted) http://www.youtube.com/watch?v=rzXbw7aTebE http://www.youtube.com/watch?v=KVtjsdWUneA
