CSF Aluminium Performance Radiator for BMW F-Series 1/2/3/4 Series (F20 F21 F22 F23 F30 F31 F34 GT F32 F33 F36 Gran Coupe) Manual + BMW i3 | TIG-Welded, Drop-In Alloy Cooling Upgrade with B-Tube Technology

CSF Alloy Cooling Radiator Upgrade for BMW F-Series Manual Models plus BMW i3

Keep coolant temps rock steady with this CSF high-efficiency aluminium heat exchanger. It is a direct-fit, bolt-on replacement for the stock unit on BMW F-Series 1 Series, 2 Series, 3 Series and 4 Series manual gearbox cars, as well as the BMW i3. Built for hard road use and regular track time, it delivers reliable thermal control in hot weather, spirited driving and motorsport environments.

Crafted from premium aluminium with expert TIG welding throughout, this uprated core uses CSF’s industry-first B-Tube core design for outstanding heat rejection and airflow performance. Each radiator is hand finished and polished to CSF’s Sho-Stopper mirror standard, and is validated in ISO 9002 facilities with rigorous leak, pressure, vibration, wind tunnel and thermal cycle testing. If you want consistent temperature management without cutting or modifying your car, this is the upgrade to fit.

Highlights

• High-capacity all-alloy construction for durability and rapid heat dissipation
• TIG-welded tanks and core for strength under sustained load
• CSF B-Tube core architecture for superior cooling efficiency and surface area
• OE-style mounts for a straightforward, bolt-on install using factory locations
• Tested to ISO 9002 standards for reliability on road and track
• Hand finished with CSF’s Sho-Stopper mirror polish
• Ideal for fast road, track days, drifting, drag, rally stages and daily driving

Vehicle fitment

Manual transmission F-Series BMW and BMW i3:

• BMW 1 Series F20 F21 manual
• BMW 2 Series F22 F23 manual
• BMW 3 Series F30 F31 F34 GT manual
• BMW 4 Series F32 F33 F36 Gran Coupe manual
• BMW i3

Note: Fits the manual gearbox variants listed above. i3 application also supported.

Why enthusiasts choose this cooler

• Reduces heat soak and helps prevent overheating during hard use
• Stable water temps for consistent performance lap after lap
• Perfect as a performance cooling upgrade or robust OEM replacement
• No trimming or cutting required, uses factory shrouds and mounts

Proven by us and our customers

We run CSF radiators on our own builds and customer cars. Feedback is consistently positive, with lower coolant temps and confidence on hot track days and fast road drives. It is a strong, efficient and genuinely direct-fit solution.

Installation and support

Professional fitting recommended. Book your install with MJ Modifications in Warwickshire. For a quotation and availability, email info@mjmodifications.co.uk.

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