Did you figure out what those numbers would be at sea level?(Corrected altitude) my friend ran a 13.2 with a bone stock 5.7 auto.at e town. I seen some 6.1s running high 12s with just drag radials.I think if you worked on your launch with some drag radials you could have done better.then again it could have been 1 of those cars built on a friday night or monday morning if you know what I mean! My 07 charger r/t runs 14.0 at 100 with my wife driving. If you buy another, get a 5.7, it'll probably run just as fast and you can save a few bucks this time. Good luck.