Improve engine oil cooling and thermal management with the CSF High-Performance Engine Oil Cooler for the BMW G8X M2, M3, and M4. Engineered specifically for BMW's 3.0L twin-turbocharged S58 engine, this upgraded oil cooler provides improved heat dissipation and consistent cooling performance during aggressive street driving, track sessions, and high-horsepower applications.
While BMW's factory engine oil cooler performs adequately under normal driving conditions, increased horsepower, sustained high RPM operation, and repeated track use can push the factory cooling system beyond its intended operating range. Excessive engine oil temperatures can result in reduced performance, protective power limitations, and increased thermal stress on critical engine components.
CSF addresses these challenges with an advanced oil cooler utilizing its proprietary AC Condenser Technology. The design incorporates a single-row, super-high-pressure 32mm microtube core with 10 internal channels, engineered to maximize oil contact with the heat-transfer surfaces while maintaining efficient oil flow.
The cooler also features 8mm-tall multi-louvered cooling fins, compared with the factory cooler's 6mm fins, increasing the available fin height for heat transfer. This construction is designed to improve cooling efficiency during sustained high-load operation.
Unlike universal aftermarket oil coolers that require custom fabrication, CSF's G8X oil cooler is engineered as a direct replacement for the factory unit. It retains the original mounting location, factory-style oil connections, and OEM rubber seals while reusing the factory ducting and shrouds without modification.
For additional protection, CSF incorporates a rock guard to help shield the oil cooler from road debris. This is particularly important on the G8X platform, where the factory cooler's exposed underbody location can make it vulnerable to damage.
Whether you're building a high-horsepower street car or preparing your BMW M2, M3, or M4 for regular track use, the CSF High-Performance Engine Oil Cooler is an essential supporting upgrade for improved thermal management and engine protection.
Fits 2023–2025 BMW M2 (G87)
Fits 2021–2025 BMW M3 (G80)
Fits 2021–2025 BMW M3 Competition (G80)
Fits 2022–2025 BMW M3 Competition xDrive (G80)
Fits 2024–2025 BMW M3 CS (G80)
Fits 2021–2025 BMW M4 Coupe (G82)
Fits 2021–2025 BMW M4 Competition (G82)
Fits 2021–2025 BMW M4 Competition xDrive (G82)
Fits 2023–2025 BMW M4 CSL (G82)
Fits applicable BMW M4 Convertible (G83) configurations, subject to vehicle-specific verification
Designed for the 3.0L S58 twin-turbocharged inline-six engine
Replaces the factory engine oil cooler
Retains factory mounting locations and OEM-style oil connections
Reuses factory ducting, shrouds, and upper/lower rubber seals
No cutting, fabrication, or permanent vehicle modifications required
Compatible with stock and modified vehicles
2026+ model-year compatibility should be verified before ordering
CSF High-Performance Engine Oil Cooler
Integrated high-pressure microtube cooling core
Protective rock guard
Factory-style inlet and outlet connections
Manufacturer: CSF
Part Number: 8266
Product Type: High-Performance Engine Oil Cooler
Vehicle Applications: BMW G87 M2 / G80 M3 / G82-G83 M4
Engine: 3.0L S58 Twin-Turbocharged Inline-Six
Core Technology: CSF AC Condenser Technology
Core Configuration: Single Row
Microtube Size: 32mm
Internal Oil Channels: 10
Core Design: Super-High-Pressure Microtube
Cooling Fin Design: Multi-Louvered
CSF Fin Height: 8mm
Factory Fin Height: 6mm
Oil Connections: OEM-Style Inlet and Outlet
Mounting: Direct Factory Replacement
Factory Ducting Compatibility: Yes
Factory Shroud Compatibility: Yes
Factory Rubber Seal Compatibility: Yes
Rock Guard: Integrated
Installation Modifications: None Required
Warranty: 2-Year Limited Warranty
OEM Part Number References:
17118095293
17218095297
17215A4DF50
Advanced microtube cooling technology utilizes CSF's single-row, 32mm super-high-pressure core with 10 internal channels to maximize oil contact with heat-transfer surfaces while maintaining efficient flow.
Larger 8mm multi-louvered cooling fins improve heat-transfer capability compared with the factory oil cooler's 6mm fins, supporting more consistent oil temperature control during demanding driving conditions.
Designed for high-horsepower S58 applications, helping manage increased engine oil temperatures associated with ECU tuning, upgraded turbochargers, and sustained track use.
Integrated rock guard protection helps shield the oil cooler from road debris and impacts that could otherwise damage the cooling core.
Direct OEM-style installation retains factory mounting points, oil connections, ducting, shrouds, and rubber seals without requiring custom fabrication or modifications.
Track-proven cooling solution developed for demanding motorsport applications, including road racing, drag racing, and high-performance street builds, backed by CSF's 2-year limited warranty.
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