The CSF 8266 is a high-performance engine oil cooler for the 2021-2025 BMW G80/G81 M3, G82/G83 M4, and 2023-2025 G87 M2 with the S58 twin-turbo 3.0L inline-6, built for high-performance driving, track use, and heavily modified S58 engines beyond 800 horsepower. It uses a 1-row super-high-pressure 32mm 10-channel microtube core built on CSF's AC-condenser technology, with 8mm multi-louvered fins versus the 6mm OEM stack. It is a drop-in fit that reuses the factory mounting location, ducting, and shrouds, and includes an integrated rock guard.
- Type: high-performance engine oil cooler
- Core: 1-row super-high-pressure 32mm 10-channel microtube
- Fins: 8mm, multi-louvered (6mm OEM)
- Engine: S58 twin-turbo 3.0L inline-6
- Included: integrated rock guard
- Fitment: drop-in, factory location and ducting
- Part number: 8266
Vehicle Applications
Direct fit on the following (S58 twin-turbo):
- 2021 BMW M3 (G80/G81)
- 2022 BMW M3 (G80/G81)
- 2023 BMW M3 (G80/G81)
- 2024 BMW M3 (G80/G81)
- 2025 BMW M3 (G80/G81)
- 2021 BMW M4 (G82/G83)
- 2022 BMW M4 (G82/G83)
- 2023 BMW M4 (G82/G83)
- 2024 BMW M4 (G82/G83)
- 2025 BMW M4 (G82/G83)
- 2023 BMW M2 (G87)
- 2024 BMW M2 (G87)
- 2025 BMW M2 (G87)
FAQ
What vehicles does the CSF 8266 fit?
The 2021-2025 BMW G8X M3 and M4 (all trims) and the 2023-2025 M2, with the S58 engine.
Is this an oil cooler or a radiator?
It is a high-performance engine oil cooler for the S58 engine.
What engines does it support?
It is built for track use and heavily modified S58 engines beyond 800 horsepower.
Does it require modifications?
No. It reuses the factory mounting location, ducting, and shrouds.
