CSF Race-Spec DCT/6speed Transmission Oil Cooler - E9X M3/1M

Unlock consistent driveline temperatures and dependable performance with this CSF high-performance gearbox fluid cooler, engineered for BMW E90, E92, E93 M3 and E82 1 Series M Coupe. Designed as a direct-fit replacement for the factory heat exchanger, this uprated unit is built for fast road, track day and drift use where the stock setup can struggle to keep temps in check.

Developed by CSF using decades of cooling expertise, the core features a dual-pass layout and increased frontal area for serious thermal control. Independent testing shows up to a 30 percent improvement in cooling efficiency compared with the standard part, with around 20 percent more surface area to shed heat faster and keep transmission fluid stable under sustained load. It drops straight in with the original mounts and connections, so no cutting or permanent changes are required. There is also generous clearance for popular supercharger systems on S65 V8 builds.

Why upgrade your BMW gearbox cooler

• Helps control fluid temps during hard driving, spirited road use and circuit work
• Protects clutch packs and synchros by maintaining more consistent oil temperatures
• Improves long-run reliability and repeatable lap-after-lap performance
• Ideal for tuned cars, track builds and heavy traffic in warm weather

Key features

• Dual-pass core for enhanced heat rejection and stable operating temperatures
• Approx. 20 percent greater surface area than the factory cooler for faster heat shedding
• Lab-measured up to 30 percent more efficient than the stock unit
• Direct-fit, bolt-on installation using OEM-style brackets and connections
• Ample clearance for aftermarket supercharger kits on S65-powered cars
• Suitable for both dual-clutch and 6-speed manual applications on the listed models

Fitment

BMW M3 E90 E92 E93 S65 V8 - DCT and 6-speed manual
BMW 1 Series M Coupe E82 - DCT and 6-speed manual

We run this cooler on customer cars and in our own builds, and the feedback is exactly what you would expect from a CSF upgrade: quicker recovery, more stable temps and confidence to push harder without the factory cooler holding you back.

Perfect for searchers looking for

BMW M3 gearbox cooler upgrade, BMW 1M transmission cooler, BMW E90 E92 E93 M3 trans cooler, BMW E82 1M cooler kit, uprated gearbox oil radiator, dual clutch cooler, manual gearbox oil cooler, performance transmission heat exchanger, motorsport cooling for BMW M3, S65 cooling upgrade, track day cooling solution.

Installation and support

Professional fitting available at MJ Modifications, Warwickshire. For an installation quote or advice, contact info@mjmodifications.co.uk.