CSF Racing Front Mount Heat ExchangerBMW G8X M3 M4 High Performance Radiator Front Mount Heat Exchanger While in stock form, the G8X's factory cooling system does a decent job keeping up with the cooling demands. While this was true of the car in factory spec, those results changed when the cars were modified and started pushing more power. As with most performance vehicles, power adders were some of the first products to be released for the new G8X platform. Bolt on upgrades, software