2003-2004 5.9L Dodge Cummins
Diesel Performance Parts and Accessories

The 2003 model year was the beginning of a new era for the Cummins Turbo Diesel.  The Common Rail Era.  Dodge ditched the troublesome VP44 in favor of the more reliable Bosch CP3 injection pump, capable of supplying fuel at up to 30,000 PSI to the rail.  Most Cummins enthusiasts would agree that this new system is easier to get big horsepower from and all without sacrificing diesel fuel economy.  The addition of the right tuner (our choice would be Smarty), a decent set of injectors, an upgraded turbo, some transmission modifications, some gauges to keep an eye on things, and these trucks will easily slip into the 500 RWHP range.

Whatever your goal is for your truck, whether it's big horsepower or better handling, we can help you out with name brands like Carli Suspension, BD Diesel Performance, Industrial Injection, Valair Clutch, Dynomite Diesel, ISSPRO Gauges, FASS Fuel Systems, Mads Electronics Smarty Tuner, Edge, Grand Rock Exhaust and much much more.

NOTE: For those of you with 2004 model year trucks, it is important to understand that there are significant differences between a 2004 and a 2004.5. Different injectors, different turbos, different exhaust systems (2004.5 trucks have full 4" exhausts and catalytic converters), different valve bodies in the transmission etc. One way to check is to locate the red or silver tag on the driver's side of your block. On a 2004.5 the tag will show a torque rating of 600 or a horsepower rating of 325.  2004's will show a horsepower rating of 305. If you are still unsure call your local Dodge dealer with the last 8 #'s of your VIN and they can clarify it for you.


If you need help with your decision don't hesitate to call or shoot us an email at cs@dieselpowerproducts.com Products in this section are designed to work on 2003 and 2004 model year Dodge trucks equipped with the 5.9L Dodge Cummins unless otherwise noted.


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