I have raced four GTOs, all LS2. I beat three(Approx 2.5 cars) and one waxed me real bad. Not sure of the mods but it was around 3 cars he pulled on me. One of the three I know had at least some exhaust work. All were manual, two races were from a dig and two a roll. I also raced a new vette at Orlando Spinworld. We both ran 13.7s, we both had traction issues spun bad through 1st and 2nd. All races were without JPC driveshaft and Steeda pullies.