No, they don't. Mid to low 13's out of the LS1's is the best that I have seen in person. From what I have seen, the LS2 cars are usually in the mid to low 13s as well, but with higher trap speed. I think my friend got a best of 13.3x @ 103-104 out of his '04 6-spd when it was stock. Not the best weather though. Middle of July.