Excellent. Down slightly on PP when compared to other tuners, but it doesn't matter because although you lose out slightly on straight line speed, this tune inspires so much confidence you can push through corners much faster than other muscle cars. It is superb on racing softs but I used sports soft tyres and it is still an excellent drive. You have retained the character of American Muscle just made it more enjoyable to drive....but just remember it is still a Muscle Car and if you overcook it it will kill you.