I am running a COBB as well, I have never run it on the track past stage 1. I have also never had an issue with over heating...I do pull the cowl off though. I would recommend the COBB AP and a good FMIC.
Funny I am heading to Sebring tomorrow ^
I run carbotechs w/ titanium shims to protect the weak brembo non SS pistons. Haven't decided if I am going to upgrade the OEM brakes or swap to BBK.
1M #643 of #740 / Ohlins R&T / FORGE FMIC / AR DPs / N55 y-pipe Mids / HPF OCC / ER CP / BMWP Seat, Spoiler, wheel