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#1
08-16-2010, 02:08 PM
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Duramax owners???
Do any of you guys own an 07.5+ gm duramax truck that has done away with the dpf and cat with an exhaust and programmer???
I have an 08 z-71 with a duramax and have been wanting to do this for better fuel mileage..just wondering if anyone here has done it and what kind of mileage are you guys seeing...Im getting a wopping 13mpg right at 14mpg taking it easy 
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