The Dodge Cummins B Series was first available on the Dodge Ram pickup truck starting in 1989 with the 5.9L straight-six, making it the only consumer turbo diesel pickup available on the market at the time. Originally outputting a then unheard up 400lb/ft of torque, the Cummins B Series has since been revised with the 6.7L Cummins to over 800ft/lbs of torque for late model Dodge trucks. The Dodge Cummins B6.7 is currently the largest straight-six engine ever produced for a light duty truck.