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 / N55 Mids / HPF FMIC / HPF OCC / ER CP / BMWP Rear Spoiler / Musicar Stage 3 sub