Hi i stumbled across the site... i left FSC for GMFS now i think i like this place better lol... they dont get into performance as much on those sites... i got a 2007 gmc sierra classic with a 5.3L.. its got the g80 3.73, diablo tuned, airaid intake, no cats wit magnaflow, best time is 14.91 runs okay i guess.. anyhow.. look forward to talking to you guys (and gals)