Mass Flo Engineering Difference


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. See general information below on what we have availabe for the Dodge 5.9 Liter or select your specific model below for details and part numbers.

Performance Injectors for Dodge 5.9 Liter: 25, 50, 75, 100, 125, 150, 175hp Upgrades

Performance Turbochargers for Dodge 5.9 Liter: Supporting up to 725hp Upgrades

Governor Spring Kits for VE Pumps: 2800 to 4200 RPM

Governor Spring Kits for P Pumps: 4000 & 5000 RPM

Delivery Valves and Holders: 25, 30, 60 and 100 CC to stock

*Performance Nozzles for Dodge 5.9 Liter: 25, 50, 75, 100, 125, 150, 175hp Upgrades

Want more detail? Select your Dodge 5.9 liter model.


Due to the popular demand, we have now released our in-house Extrude Honed Performance nozzles. For your safety and in order to gain the most from your investment, injector nozzles should be installed by a qualified professional in a facility designed for that type of work. We are happy to assist you with that installation right here at MFE or we can recommend a diesel fuel injection service center for your area. MFE will never ask you to use your truck as a test stand. Read More Here


MFE is your home for premier performance diesel upgrades. Whether it's fuel or air flow, we help you achieve Mass-Flo.