pretty much whats already been said above, xrt or smarty...just make sure when you do the exhaust you go with the downpipe delete as well not just the dpf/cat delete because there is a nox filter in the downpipe that needs to be gotten rid of.
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2007.5 Quad Cab 4x4 6.7L ,Automatic, TS Mp-8,S&B Intake, Flo-pro 5" turbo back,H&S Powered!!, EGR Deleted, PATC Line Pressure Booster, Rokktech Crank Sensor
1990 W250 4x4, 5.9L 5speed Getrag, AFC Spring MIA, Pin Modified, Advanced to the max, 2 turns power screw*(263hp 611ft/lbs),Piston Lift Pump...TBI PDI Manifold, 2nd Gen Intercooler, DDP 3 Sticks, Phatshaft 64 Turbo