On the street I have only lost once. It was to my body in his 00WS6. My truck was running like poop and pulling back a lot of timing up top. Lets say I got that fixed fast though. At the track I have lost a few times. The best LOSS I had was too a supercharged Jeep Grand Cherokee running 12.5X when I was going 12.6X's. It would be a different outcome now though. I don't mind loosing. There is always someone faster. -Mat-