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The 2790 filter number is what it is...its not even really made for the cummins, but it does happen to fit. If you want to run one what you have to figure out is if you have room under the hood to put it. Like Drew said in an earlier post the air intake set up is different for the 3rd gen opposed to the 2nd gen.
I realy doubt things under the hood have changed from 03-07 so it should fit. . .just be warned though, it is a tight fit between the battery, altenator, and radiator.