Go to the Dodge Cummins forum and you will get an education on what can be done to improve the life of your diesel. Your 11 dodge has an egr valve, throttle valve, Cat, Nox and DPF filter. The throttle valve is set so it will not completely open from the factory, cutting down on air intake. There are a number of variations you can do to improve your mpg and life and it's about how much you want to spend. My dealer gave me an old DPF filter and I bored it out, then purchased a used Nox canister off Ebay and bored it out as well. Replaced my factory equipment with the "Stealth" equipment. Replaced the throttle valve with one that does not have the butterfly valve, so It is open 100%. Disconnected the EGR, Ran a Smarty computer to change the parameters of the factory settings so no codes would be thrown....I change my oil every 5,000 miles it use to look like mud coming out, now its almost as clean as when I changed it. No running exhaust back through the engine, no ReGens, reduced back pressure in the exhaust....left the cat alone....I can put all the factory equipment back on when I get ready to sell the truck with in a few hours. I did this for MPG not more power and you have different settings to add power. I have a manual so can only run on three settings. I use the lightest setting at all times. Once you witness the difference in how your truck performs, Mpg etc, you will never go back. The newer cummins have DEF which replaced the DPF and uses a fluid to
crystalize sort of speaking the particles in the exhaust and then they are burned up in the Cat. This system can now be bypassed as well....just do some exploring and you will find all you need. My Cummins was getting 19.5 off the show room floor and after about 20,000 miles Dodge came out with and EPA update and flashed my truck, dropping my mpg to 14 at best. Dodge did this without me knowing and then said they could not return the truck back to the previous flash...so I did it another way. Hope that helps....but I have to say, I do not have emission checks so this was not an issue. This also voids your warranty, however my dealer knew and continued to do all service and warranty on the truck. They just cannot flash the truck ever again or it will show up into Dodges system. Once the factory equipment is reinstalled and the smarty returns all setting to factory, the only thing that will show up is that the truck was flashed more times than Dodge had completed.
