I'm also very impressed with those numbers, especially given that the emissions systems are completely intact. As far as reliability goes, Cummins and RAM made HUGE improvements to the 6.7L platform for this new engine. So I would be completely comfortable with those HP levels on stock engine. As far as the trans goes, I know they said they made some improvements but I am not 100% sure what they were. I am excited to see these emissions compliant tunes come out though!