The 06 running stock (no XZT) ran a 10.4 at 66 mph but this was in 2wd w/o any boost off the line. My reaction time was bad because the lights staged too fast 1.2 and .91 sec. I have no doubt that the XZT would have put me in the mid 9's. I just wanted a good base to go by before I get my Smarty. But for $20 and unlimited passes it was fun. I was the only diesel out there though.