CSF 8081 DCT Gearbox/Transmission Oil Cooler/Radiator for BMW S55 - F87 M2 Competition, F80 M3, F82/F83 M4 (F8X) - High-Efficiency Dual-Pass Direct-Fit Heat Exchanger, Bolt-On Upgrade Kit by CSF Radiators

CSF 8081 High-Efficiency Gearbox Oil Radiator - BMW F87 M2 Competition, F80 M3, F82 F83 M4

Keep the dual clutch gearbox in your S55-powered BMW running cool and consistent with the CSF 8081 high-performance gearbox oil radiator. This direct-fit, OEM-style upgrade is designed for hard B-road driving, repeated pulls and track days, delivering serious temperature control and long-term reliability for F87 M2 Competition, F80 M3 and F82 F83 M4 models.

Built around CSF’s 26 mm multi-channel microtube technology with a two-pass core, this motorsport-grade heat exchanger offers a 67 percent increase in cooling rows and has been independently lab tested at around 30 percent higher efficiency than the factory unit. Expect faster heat rejection, less heat soak and more stable shift quality from your dual clutch auto during demanding use.

We run this radiator on our own S55 cars and our customers have been thrilled with the consistency and protection it provides. If you are tuning, tracking or simply want bulletproof temperature management for your M2C, M3 or M4, CSF 8081 is the upgrade we recommend.

Key reasons to upgrade

• Significantly lowers gearbox oil temperatures for fast road, drag strip and circuit driving
• Improves reliability under sustained load and reduces the chance of limp mode
• Bolt-on, direct-fit install using factory mounts, connectors and shrouding
• Perfect companion for mapped S55 builds, hybrid turbos and track-day setups
• OEM-level fit and finish with proven CSF durability

Technical highlights

• 1-row super high-pressure 26 mm multi-channel microtube construction
• Dual-pass core with 10 cooling tubes versus OE single-pass 6-tube design
• High-density, multi-louvered fin pack for maximum heat dissipation
• Approximately 30 percent more efficient than stock in laboratory testing
• Uses factory lines, brackets and ducting for a clean, hassle-free fit

Compatibility - S55 3.0 twin-turbo

• BMW F87 M2 Competition
• BMW F80 M3
• BMW F82 M4
• BMW F83 M4 Convertible

Fitting and installation

The CSF 8081 is a direct replacement for the factory gearbox radiator and accepts the original hoses, brackets and shrouds. For professional installation, book with MJ Modifications in Warwickshire. Request a fitting quote via info@mjmodifications.co.uk.

Compatibility check before dispatch

We verify fitment prior to shipping. Add your UK registration number or the last 7 digits of your VIN at checkout so we can confirm suitability for your M2 Competition, M3 or M4.

Part number

CSF 8081

Manufacturer and warranty

Manufacturer: CSF Radiators

Warranty: CSF lifetime warranty

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