If you are not tuned, invest in the Performance radiator and secondly in a oil cooler.
Make sure that you do not push it to hard for to long and consider new (ATF) oil after tracking as your gearbox realy does not like ATF fluid that has been overheated (It becomes useless).
If you are tuned, go conservative for the track, most people do not benefit from the HP's on the track and it mostly just generates a lot of extra heat.
Most important, take some lessons, good driving skills will also reflect back into less stress on the car as you migh start to drive more fluent.
BMW 335 E92 08 - Full options - RIP
BMW 335 E92 09 - Full options - DKG - Procede Rev 3 - Vishnu Meth and Chargepipe - Forge Diverter Valves - Vishnu Flex Fuel Kit- AR Catless DP - Afe Intake - Helix IC - Ar Oil Cooler - PPK Water Cooler - M3 Suspension - JRZ RS1 Shocks - Eibach Pro Springs - Drexler LSD - BMW IS Exhaust - EBC Yellow Brake Pads - Stainless Steel Brake Lines - M101 Wheels - Michelin PSS - M-Tech Body - M-Strutbar