Description
ATS TCM Upgrade, A50 To T87 4 Wheel Drive For 2011 2014 GM 6.6L Duramax interior upgrades Maintains factory payload capability HSK66 12637785 12637788 Maintains factory payload capability Affordable Performance: Cost effective alternative to premium Morimoto XB series The Co Pilot functionality allows the factory Allison transmission to handle higher power levels and much better durability Increases throttle response