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Message: <blockquote data-quote="4play" data-source="post: 1991166" data-attributes="member: 7223">CHenry, what tune were you running?  There are 6.4 trucks putting up those numbers but not on a tune only .  Are you sure you didnt also have a DPF and/or Cat delete, intake, or some spray?   To run those numbers you would have to put a major beating on the trans doing high boost launches, was the trans stock too? To not be so sure on the dyno numbers is one thing but to claim running in the 12's with an over 8800lb (4x4 crew cab dually?) truck with nothing but a tune is sounding pretty hard to believe.</blockquote>