If you have 18-inch 12-spoke factory rims and no one put them on there besides the factory you have the same package as me.
"2007 Cadillac CTS w/ Sports Appearance Package - 18-Inch Sport aluminum polished finish wheels, performance braking system, limited slip differential, P225/50R-18 performance W-speed-rated tires, Performance-Handling suspension with rear load leveling and speed-sensitive variable-assist steering, StabiliTrak, Tire Pressure Monitor, sport rocker moldings, chromed exhaust tips, sport grille with chromed mesh accents, decklid spoiler and body-color custom rear fascia"
The 3.6L CTS does not get any better then that as far as stock goes.
I have had my car on the drag strip but not on the track yet.
Hopefully Jon sees this thread, he has done a good amount of auto x in his 3.6
Here is his website http://www.jon04ctsv.com/ (he has a V and a 3.6) I think he may have some auto x vids on there somewhere, if not they are floating around in this forum, here is his forum member page http://www.cadillacforums.com/forums/member.php?u=8316