Stock 6.7 clutch slip?
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Well break in has a lot to do with that too, i have 50k on mine, the xrt helped my fuel milage enormously, i haven't hand calculated it, but my overhead shows 24 mpg at 75 mph, in town it shows 20! But, just cause it does that good with mine, doesn't mean it'll do the same with yours, all trucks act different. But i love my xrt, if your lookin at one my opinion is go for it! the guys at h&s are top notch, they'll help ya out with anything, plus james from rsd called me the other day sayin they lowered the prices 5%!
Last edited by my09cummins; 03-18-2010 at 11:35 PM. Reason: Automerged Doublepost
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Rollin Smoke Diesel (03-19-2010)
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James
RSD
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