MoTeC MDC/MDC2 Mitsubishi Lancer EVONEW LOWER PRICE! MoTeC's Diff Controllers replace the factory fitted Active Centre Diff (ACD) and Driver's Control Center Differential (DCCD) controllers found in Mitsubishi Evo and Subaru STI vehicles respectively as a bolt in replacement offering greater control over the handling characteristics of the vehicle. The MDCs can be used in vehicles fitted with the ACD AYC (Active Yaw Control), but the AYC will be disabled.