Installaton of the CSF radiator improved my cooling to barely adequate. To try and improve things further, I have added three Trackspec hood vents. Trackspec doesn't have a E82-specific kit, but E90 E92 M3 Center Vent and a pair of their Large Rectangular Universal Hood Louvers fits nicely in our cars, if you are prepared to do a bit of trimming of the hood reinforcing structure.
I will give them a good test this weekend at Calabogie where the temperatures are supposed to peak at 32°C / 81°F.
