I just saw a video on u tube, an 18 Gt with the new 10 speed auto and performance pack ran a 12.49 on the factory street tires. The PP gets you 3.55 gears with the auto. LMR put a set of drag radials on an 18 w/auto and ran an 11.88. I think ford underrated the new 18's, one guy had his dynod and is getting an estimated 490 crank, and someone else did too and got 500