The Cummins B 5.9 was introduced in 1984 as an agriculture engine. It was not until 1989 that it became the first B-Series Cummins engine to be used in a light duty truck; the Dodge Ram. The B 5.9, also known as the "12 Valve", became a popular alternative to the V8 engines typically used in these trucks, as it generated nearly double the torque at low engine speeds and nearly doubled the fuel economy as well. Mid-year in 1991, the B 5.9 received an intercooler. The 12 valve featured Bosch Direct Fuel Injection utilized a VE injection pump between 1989 - 1993, and a P7100 injection pump between 1994 - 1998. The 12 valve 5.9 remains one of the most popular engines in the market, despite being replaced by the 24 valve ISB midway through the 1998 model year.