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Attention: TDR Forum Junkies To the point: Click this link and check out the Front Page News story(ies) where we are tracking the introduction of the 2025 Ram HD trucks.
Give us some more time and we will have approx 3 options for you to select from on the 2004. 5 trucks. They are in development as we speak, just need time to test and then the tooling needs to be made etc.
Changing exaust alone will probably not give any appreciable increase in power or MPG, assuming that's your purpose. Removing the CAT will cause possible warranty and/or legal problems. I removed a CAT from a vehicle in the 80's and had multiple problems.