Cummins 6.7L 2013 Silver Bullet 64 Kit (2500 ONLY). This kit is designed by Industrial Injection as the best single turbo upgrade for the 6.7L Cummins engine. This kit includes: Silver Bullet 62 Turbocharger (62/74/80 turbo wheel dimensions) 64 is compressor wheel size, 74 is exhaust wheel size, & .80 A/R is the housing size. *All Industrial Injection Performance Products Are Not Legal For "On-Road", "Off-Road", or "Dual-Use". These Products May Only Be used In "Closed Circuit Competition Only" Vehicles. Compliance With State And Federal Emission Standards Is The Consumer's Responsibility.