B Series - 3.3/3.9/4.5/5.9/6.7

The Cummins B Series is a family of straight-four and straight-6 diesel truck and industrial piston engines manufactured by Cummins. The B Series is known for the popular 3.9L (238.0 cu in) straight-four and 5.9L (360.0 cu in) straight-six motors. A 3.3L (201.4 cu in) straight-four is also available as well as a 6.7L straight-six. The B Series is widely used in many segments, including pickup trucks (the Dodge Ram), buses, military vehicles, construction equipment, and marine. Some of the construction and marine applications have actually featured two B series Cummins engines. The engine was originally designed by Cummins and Case Corporation for commercial truck applications, and gained much of its popularity after appearing in the Dodge Ram, in 1989. (Source: Wikipedia – http://en.wikipedia.org/wiki/Cummins_B_Series_engine)