a .517 60 foot time is tooting the wheels FAR past the 60 foot mark. guys that run 9's at 160 can only cut 1.2 60 foots. i think you mixed up your numbers a bit. plus an 11.5 is A NEW WORLD RECORD for just cat back or mufflers.

do you still have the time slip. 113mph for a stock tire/suspension cobra should be around 12.6 if you cut a good sixty. a bad sixty and you could easily be 13.5.

the mph is pretty accurate but i think your e.t. is a little off.