Trying out a set of Hoosier TAPs as a square 275-35-18 setup.
Found a new PB this weekend by 1.4s, going from a 1:49.4 to a 1:48.0. 
The car and setup still has a good 3-5s easy with a good driver mod.

Mods to the car:
-Down pipes and charge pipes. Running stock boost with the tune and AFR just cleaned up.
-Caddy Issues intercooler reservoir (highly recomended for HPDE).
-G-lock R16 and R10 pads
-CT4 BW brake deflectors
-70lbs of weight reduction over stock. Mainly in the exhaust and rear seat weight. (Driver could stand to lose 40lbs lol).