I know two guys with LS1 WS6s. One guy has some stuff done, exhaust/some sort of chip/tune headers and a lid. Probably has a few other things, his car is a 2002 with the 6 speed, his best time was a 12.9@110mph, he ran many low 13s @108 before that. Another kid i know has a 2002 WS6 that has exhaust. Its also a 6 speed and his best time was a 14.0@104mph and he has taken it to the track a number of times. Drivers make a huge difference, most LS1s you see at the track will run mid to high 13s stock, thats what the average driver will do. The LT1s will be running mid to low 14s stock from many times i have gone to the track thats what i have seen. This is at Island Dragway in NJ.