I agree with iceman, I would not suggest it to a backyard mechanic style of doing it. You will need to put the car on a lift to drain the fluid, remove the bellhousing, remove pilot bearing, and so forth, plus you have to get clutch to bearing clearance and adjust it for 1.5-2" of clutch play (pedal free play).
I would suggest a stage 1 clutch or now at days stage 2 which will grip a bit better than OEM. It would also help if you ever plan on modding it slightly. Plus the performance clutches mentioned maybe cheaper than an OEM. You also have to measure the flywheel run out to see if you can either replace it or resurface. In most cases, a new flywheel would be wiser.
2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille