Jay Leno drives a custom hand-built 1978 model and says he ... They swapped in a rebuilt 24-valve Cummins diesel power plant that produces around 260 horsepower and 350 pound-feet of torque.

Such is not the case for the 2nd-gen Dodge Cummins. Providing owners with an impressive amount of power at the disposal of their right foot, in addition to a stylish body and comfortable cabin ...