Arguably one of the hottest German performance vehicles of the decade, the G8X M3/M4 has quickly become a favorite among enthusiasts and race teams alike. Like many BMWs, the S58 motor has some heat issues under heavy driving conditions when modified. CSF has been working tirelessly for the last year on a complete suite of industry-leading cooling products for the G8X platform. Now, with over 9 months of development and testing, CSF is pleased to announce the release of its highly anticipated high-performance G8X M3/M4 Heat Exchanger (CSF #8215) for both 6-Speed Manual (6MT) & ZF8 Automatic Transmissions.

CSF has worked closely with race teams throughout North America throughout the prototyping and development process. The feedback gathered from daily driving, track days, and competitive drag racing events has lead to the best possible iteration of the Front Mount Heat Exchanger.
When the new M3/M4 was released in late 2020, it didn’t take long to see them hit the track. CSF’s Engineers and Motorsports department was in attendance for some of the first track days that local R&D Partners & Premier Dealers Studio RSR and Art of Attack took their new G8Xs to.

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. CSF quickly observed issues with heat soak in the charge-air system. This overheating of the intercooling system causes a spike in Intake Air Temperatures (IATs). Subsequently, the ECU started pulling timing which decreases power output. In extreme cases this can also send the car into limp mode. This problem became even more prevalent as testing continued into the hot summer months.

As with most performance vehicles, power adders were some of the first product to be release for the new G8X platform. Bolt-on upgrades, software tunes, and upgraded turbos are all great for speed, but start to create heat issues. Any time you add power to your car, you naturally increase the amount of heat the engine produces.

Design, Development & Engineering

With well over 100 track hours worth of testing and thousands of miles on the road, you can be assured that the CSF’s new High-Performance Front Mount Heat Exchanger has been thoroughly tested and vetted.

The CSF Heat Exchanger features a 2-Row (vs OEM single row) Core that is 42mm thick with CSF’s Exclusive B-Tube Technology. Increasing the size of the core and end tanks adds to the overall volume of the system which helps absorb more heat. The more efficient core not only helps dissipate more heat from the system, but also provides better airflow into the radiator that sits behind the heat exchanger. For vehicles equipped with the ZF8 Automatic Transmission, the heat exchanger core specifications were design concurrently with CSF’s new Race-Spec Dual Core Transmission Oil Cooler (#8221 – coming soon