CSF 8221 Dual-Core Transmission Oil Cooler with Rock Guard for Select 2021-2025 BMW M2/M3/M4 (G8X)

Fits select 2021-2025 BMW M2, M3, and M4 (G8X) models.

The CSF 8221 High-Performance Dual-Core Transmission Oil Cooler is an essential upgrade for G8X owners who demand superior thermal management during road racing, drag racing, or high-performance street driving. This drop-in replacement utilizes a dual-core design that provides a massive 194% increase in core and tank volume over the factory unit, significantly reducing transmission fluid temperatures under high-load conditions and with aftermarket transmission tuning.

Engineered using CSF’s advanced AC condenser technology, the cooler features a 1-row, super-high pressure 16mm 9-channel microtube for maximum surface area contact and optimized oil flow. The system includes an integrated front rock guard to protect the core from debris and utilizes OEM-style "Quick Connect" inlet/outlet ports for a seamless installation using factory rubber seals.

• Fluid Capacity: 1700ml (94% increase over OEM 875ml)
• Core Thickness: 44mm (Two 22mm stacked cores)
• Construction: 32 total rows (16 rear / 16 front)
• Overall Height: 191mm (vs. OEM 155mm)
• Direct "Drop-in Fit" requires no vehicle modifications
• Compatible with CSF #8215 Heat Exchanger or OEM cooling systems
• Manufacturer Part Number: 8221
• 2-Year Limited Warranty