Engine & Performance
Wheels & Tires
Need parts for your 04.5-07 5.9 Cummins? You are in the right spot. Everything from air intakes to twin turbos to dual CP3's, we've got what you need. 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.
Diesel Power Products carries everything you need for your 5.9L including FASS Fuel systems, FLO~PRO Exhaust Systems, ISSPRO EV2 and Autometer Factory Match Gauges, BD-Power Injector Nozzles, Mag-Hytec Transmission and Differential Covers, Smarty Programmers, Valair and South Bend Clutches, Carli Suspension, Snow Performance Water/Methanol Injection systems and much, MUCH more.
As always, if you have any questions as to what products are right for you and your Ram, do not hesitate to give us a call and we would be more than happy to help. Products in this section are designed to work on 2004.5, 2005, 2006 and 2007 model year Dodge trucks equipped with the 5.9L Dodge Cummins unless otherwise noted.
Q: How do you find out if your Cummins is a 2004.5 or a 2004?
A: There are two ways. First, you can check the drivers side of the valve cover at the estimated horsepower. If the truck is a 2004, it will indicate 305, whereas the 2004.5 models are rated at 325 horsepower. Secondly, early 2004 models (non-California) did not have a catalytic converter from the factory, where 2004.5 models do. If your exhaust is still original, this is an easy way to check.
Q: What is the difference between the 2007 and the 2007.5 Cummins?
A: In 2007.5 Ram introduced an emissions controlled engine that was the 6.7L in comparison to the 5.9L they had in 2007. The 6.7L has higher power ratings and came equipped with a factory EGR (Exhaust Gas Recirculation) system and DPF (Diesel Particulate Filter) in the exhaust. Both were done in response to heightened EPA regulations that went into effect January 1st, 2007.
Q: Do I need the Extreme Duty Red-Head Gear Box, or the regular unit?
A: The Extreme Duty is built for those running exceptionally large tires, such a a very wide 35" or a 37" or larger diameter. This model would also be a good idea for those vehicles whom regularly see off road use.
Q. Why does it sound like my transmission rattles after I installed a new clutch.
A. That noise that you are hearing is called gear rollover noise. It is evident in all transmissions, which is the reason the factory originally installs dual mass flywheel clutches beginning in 2005 with the G56 model, as they will cut down on that noise. The G56 is especially bad because it has a large aluminum case that acts as a megaphone. It is a completely normal condition, but can be helped. We typically recommend filling the fluid up to the fill plug in the transmission, then pulling the shift tower and putting one extra quart in. That will significantly cut down on the gear rollover noise.
Q: I'm looking at an exhaust kit on your website, but it doesn't state which cab and bed configuration it fits, will this fit my application?
A: In most cases, unless it is specifically stated as fitting a certain configuration, all exhaust kits on our website will fit all cab and bed lengths. Further, most kits will not fit cab and chassis applications unless otherwise noted.
Q: I'm looking at this 5" (or other) exhaust kit, but my truck only has a 4" exhaust now. Does this 5" exhaust include an adapter / reducer?
A: Yes, the exhaust systems we sell will adapt down to fit the application at the designated starting point (turbo back, cat back, DPF back, etc.) for a hassle free installation.
Q: What are EGT's?
A: EGT stands for Exhaust Gas Temperature, which is the temperature of the exhaust leaving your engine. This measurement is typically measured before the turbo to ensure you are not overheating components. For most applications, we recommend not exceeding 1300 degrees.
Q: Do you offer smoke and lope tunes with any of your preloaded EFILive AutoCal options?
A: No we do not. In short, both smoke and lope tunes create these results at the expense of the overall reliability of your engine. The tuning companies we have chosen to partner with are top notch and are most intested in creating increased power, fuel economy, and overall drivability. We at Diesel Power Products invest a substantial amount of time and effort to ensure that the products we recommend are in the best overall interests of our customers and their trucks, and unfortunately, these types of tunes do not align with that overall goal.
If you've got a question about your Cummins, feel free to give us a call at 888-99-DIESEL and we would be happy to assist.