IF I build it up at all say 2000 rpm are more it just eats the tires up,2013 gt with cai,tune,373s axle back roush,if i just put it to the floor no build up,spins a little 2nd spins a little 3 rd gear chirp,best run i could get was a 13 flat with trac control off,with advance trac on 13.1 1/4 mile, yes stock tires 19" pirellis. havent tried letting air out of tires yet ???