CSF Aluminium Performance Radiator BMW 1M Coupe (2011), E82/E88 135i Manual (20082013), E90/E92 335i Manual | B-Tube Alloy Direct-Fit Drop-In Upgrade

Alloy Cooling Upgrade for BMW 1M, E82 E88 135i and E90 E92 335i Manual

Give your N54 and N55 powered BMW the cooling headroom it deserves with this CSF high-efficiency aluminium radiator. It is a true bolt-in, plug-and-play replacement for manual gearbox models and is engineered to keep coolant temperatures stable on fast road and track days. If you are chasing a reliable cooling system upgrade for tuned cars, this is the proven solution that enthusiasts choose.

Why this radiator stands out

• CSF B-tube core design for maximum heat transfer and efficiency across a thicker, high-capacity core
• TIG-welded aluminium end tanks replace fragile plastic tanks to combat cracking and leaks under high pressure and heat
• Optimised fin density and increased surface area for rapid heat rejection during spirited driving and track sessions
• Strong yet lightweight construction compared with conventional single-tube designs
• Direct replacement using factory fan shroud, hoses and mounting points for a clean OEM+ install
• Developed and validated in the USA with wind tunnel, vibration, thermal cycle, burst pressure and salt-spray testing
• Each unit is pressure and leak tested with a detailed inspection for dependable quality
• Backed by a CSF 2-year warranty for peace of mind

Real-world confidence

We run CSF alloy radiators on our own cars and customer builds. Feedback has been consistently positive, with lower running temps, improved stability in traffic and on circuit, and rock-solid reliability on tuned N54 and N55 setups.

Vehicle compatibility

Direct-fit for the following manual transmission models:

• BMW 1 Series E82 and E88 135i 2008 to 2013, including 135is
• BMW 1M Coupe 2011
• BMW 3 Series E90 and E92 335i manual

Fitment note: the uprated core is thicker than stock. Clearances are tighter around the expansion tank and accessory belt. Reuses original shrouds, hoses and mounting hardware.

Perfect for tuned and track-driven cars

Ideal for stage 1 and stage 2 remaps, hybrid turbo builds, hard road use and regular track time where an uprated radiator is essential. Expect quicker recovery from heat soak and more consistent performance lap after lap.

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Professional fitting

Want it installed properly first time We can supply and fit at MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.