Race tune by far is the best I have ever had...I tried going back to the performance tune on a long highway trip and when I got to my destination I switched back to the race tune. The throttle is sooooooo freakin amazing on the race tune....to me...the performance tune is damn near stock....not much of a difference. The race tune pulls so hard... I have an auto and this sucker chirps in every gear except fifth...but the shift to fifth will snap your head back...its nutz!!