Stock 6.0, 2500HD extended 4X4, intercooled Procharger, with 11psi, 42# Racetronix injectors, SW, Mainline Dyno'd 403.5 SAE RWHP 5200 !! Not too bad for the tow vehicle getting to the track on time. Thanks to Chris @ Big Power Racing in Bayshore L.I., and also a big Thanks to Lonnie @ Lonnie's Performance in PA for the new fuel system