I went to Atco last night for the first time with my L. I am very happy wth the results! My best et was 12.65 @ 106.8,with a 1.7 60 ft. time. My mods are upper and lower pulleys,K&N filter kit, and Diablo chip programmed by Nitrous Pete. This was also on my stock tires. This weekend the truck will get a new converter,Bassani catback exhaust, and M&H race tires and rims. Also a new program to match mods. I love this truck and can only hope for low 12s next week!!!