Extreme Performance. Only updated mods since my last dyno at 428rwhp was the aluminum driveshaft and Mobil1 full synthetic (and suspension mods)...dunno! Temps/humidity were about the same too. The 428 dyno was minutes after the TVS install so the computer may have not "learned" yet. Been a few months now so that may have attributed to the gains also.

A/F still isn't where I want it and I'm getting belt slippage so my boost graph is all over the place. Not bad for the Roush canned tune. I'll take the 449rwhp and 404 ft-lbs. torque though