Upgrade your BMW G8X cooling system with the CSF #8221 High-Performance Automatic Transmission Cooler — engineered for modified, tuned, street-driven, and track-used BMW M cars equipped with the ZF8 automatic transmission. This is a serious cooling solution designed to help maintain more stable transmission oil temperatures, preserve shifting performance under load, and add protection for high-heat driving conditions.
| Brand | CSF |
| Part Number | 8221 |
| Product Type | High-Performance Automatic Transmission Cooler |
| Transmission | ZF8 Automatic |
| Core Design | Dual-Core / Dual-Pass |
| Fluid Capacity Increase | Approx. 94% over OEM |
| Volume Increase | 194% increase in core & tank volume |
| Connection Style | OEM-Style Quick Connect |
| Installation | Direct Drop-In Fit / No Modifications Required |
| Protection | Replaceable Rock Guard Included |
| Warranty | 2-Year Limited Warranty |
The CSF 8221 was developed to address the demands placed on the factory transmission cooling system when power is increased and the car is driven hard. Compared to the OEM single-core layout, CSF’s upgraded dual-core architecture gives you more cooling volume, more fluid capacity, and greater heat dissipation potential — all while retaining an OEM-style fit and finish.
CSF also integrates advanced microtube condenser technology to optimize oil flow and maximize surface area contact, helping improve cooling performance in aggressive street and track environments.
Fits BMW models equipped with the ZF8 automatic transmission, including:
Replaces / references BMW OE part number:
CSF is one of the most recognized names in high-performance cooling, and the 8221 cooler is purpose-built for enthusiasts who demand better thermal control, durability, and reliability from their BMW M platform. If you are upgrading your G8X or G87 for hard street use, competition use, or transmission tuning, this is the kind of cooling support that helps protect performance.