CSF BMW M3/M4 F80 F82 F83 S55 DCT/DKG Transmission Oil Cooler - Performance Gearbox Cooler Heat Exchanger Radiator - Direct-Fit Getrag 7-Speed Dual-Clutch F8X Upgrade

Keep your BMW M3/M4’s dual‑clutch running cooler, faster and longer. This race-spec dual clutch gearbox oil cooler is the go-to upgrade for S55-powered F80, F82 and F83 owners who demand stable temperatures on road and track. If you’re pushing harder with remaps, sticky tyres or regular track days, this front-mounted oil radiator dramatically improves heat rejection and consistency to help prevent limp mode and protect your transmission over the long term.

Engineered with high-pressure multi-channel microtube construction and a tightly packed louvred fin pack, this two-pass core routes fluid across ten cooling tubes, compared with the factory unit’s single-pass layout and six-tube design. Independent testing has shown around 30% better thermal efficiency than the standard cooler, delivering quicker temperature recovery, repeatable performance and confidence lap after lap.

Why enthusiasts choose this DKG cooling upgrade

• Two-pass performance core with 10 tubes for significantly improved heat rejection vs. stock
• 26 mm multi-channel microtube architecture derived from condenser manufacturing for high pressure and durability
• High-density louvred fins maximise surface area and airflow for superior cooling
• Approximately 30% more efficient than the factory heat exchanger in lab testing
• Direct bolt-on installation: uses your original lines, brackets and shrouds with no cutting or drilling
• All-aluminium, lightweight construction built for motorsport environments
• Proven on our own builds and customer cars; excellent reliability and temperature control on spirited drives and track days

Perfect for

• BMW F80 M3, F82/F83 M4 with the 7-speed DKG/dual-clutch gearbox (S55 engine)
• Track day and fast-road use where heat soak and rising transmission temperatures are a concern
• Tuned and higher-power applications seeking consistent shift quality and drivetrain protection

Fitment and compatibility

Designed specifically for the S55-powered M3/M4 platform with the dual-clutch transmission. Retains all factory oil line connections, mounting points and ducting for a clean, OEM-style installation.

Installation at MJ Modifications

Want it fitted by experts? Book professional installation with MJ Modifications in Warwickshire. We’ve installed these units on numerous S55 builds and can provide advice on complete cooling packages for track work. Request a fitting quote: info@mjmodifications.co.uk.

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