CSF - BMW G8X M3/M4 ZF8 High-Performance Automatic Transmission Cooler

The new CSF transmission oil cooler for the ZF8 automatic in the G8X M2/M3/M4 is engineered for high-performance and track-use applications. Featuring a unique dual pass design, the CSF Transmission Oil Cooler nearly triples the volume of the OEM unit and increases fluid capacity by ~94%.

The core features advanced micro-tube condenser technology derived from CSF's A/C cooling systems. Its 9-Channel Microtube design optimizes oil flow and offers maximum surface area contact. Installation is plug and play with the drop-in fit design. The CSF cooler retains OEM quick-connects and includes a replaceable rock guard for additional protection from road or track debris. This packaging helps preserve shifting performance, maintain optimal transmission oil temperatures, and extend transmission life in modified or race-prepped G8X M Cars.

While the OEM Transmission Cooler is adequate for the G8X in stock form, it starts to come up a bit short on modified/tuned vehicles. Specifically ones that see heavy track/competition use. Transmission oil temperatures have a major impact on the shifting performance of your automatic transmission. If the fluid passes optimal temperatures you will start to see some delays in shifting. Sluggish shifting can be quite frustrating, but the real concern is the damage that can be done to the transmission when temperatures get too high. There are often cases where drivers don't notice the change in shifting performance due to the gradual onset, but the damage is still being done slowly on a very expensive and important component.

By changing from the OEM single core design to a dual core, CSF was able to increase the overall volume by 194%. This design offers a drastic improvement in heat dissipation and increases the fluid capacity of the coolers by ~94%. Utilizing CSF's AC Condenser Technology, a 1-Row Super-High Pressure 22mm 9-Channel Microtube design optimizes oil flow and offers maximum surface area contact. These features combine to offer the best possible heat dissipation from the system.

CSF knows the kind of punishment the front of a car can take on or off the track. The wrong bit of debris flying through the front grille can quickly punch a hole in a cooler. Because the Transmission cooler sits at the very front of the center cooling stack, it is quite vulnerable to damage. In addition, "open face" race style grilles have become quite popular on the G8X. These grilles can add to the risk of debris passing through.