As Cummins Celebrates our 100th year in business in 2019, we also celebrate a 30-year partnership with RAM truck that started with the Cummins 5.9L Turbo Diesel in model year 1989 through our latest 6.7L Turbo Diesel. For the model year 2019 RAM, the 6.7L Cummins Turbo Diesel delivers more horsepower and torque, improved NVH and reduced weight.