The first Cummins powered Dodge Ram truck was released in 1981. This 12V or 6BT truck produced 160HP and 400lb/ft of torque. This increase in torque and fuel economy made it a popular alternative to the gas powered trucks. This Cummins engine is an Inline-six design. In the next few years they made numerous changes to the engine including the addition of an intercooler and changing of the injection pump.

In the year 1998 the 5.9L 24V Cummins Engines were released. These engines produced 235hp and and 460lb/ft of torque. Throughout the years of 2001-2004 Cummins also produced an HO or high output engine. These were only available with the manual transmission. Increased compression   and unique engine calibrations allowed this engine to produce additional power and torque.

In 2007 Cummins introduced the 6.7L. This engine still featured an inline-six design and is still used to date. Producing 350-400hp and 350-1000lb/ft of torque it was available with manual transmission, the 68RFE Transmission or the Aisin AS69RC transmission. With the release of the 6.7L came the introduction of the DPF filter to the Cummins. This lead to numerous problems with clogging and various new calibration releases.