MMR Competition Uprated Aluminium Radiator Kit - BMW F Series B48/B58 Performance Cooling Upgrade, Heavy-Duty Track Day Cooling Pack (M140i M240i 340i 440i 230i 330i 430i | F20 F21 F22 F30 F31 F32 | 1/2/3/4 Series)

MMR Competition Radiator Kit for BMW F Series B48 and B58 engines

Keep coolant temperatures rock steady and power repeatable with the MMR Competition Radiator Kit. This high-capacity cooling solution is built for hard-driven BMWs, delivering confident thermal control for spirited road use and track days on B48 and B58 powered cars including M140i, M240i, 340i, 440i, 230i, 330i and 430i on the F20, F21, F22, F30, F31 and F32 platforms.

We run this kit on our own cars and customer builds and the feedback is consistent, cooler running, stronger sustained performance and far greater confidence in hot weather and during repeated pulls. If you are remapped or regularly drive quickly, this is a smart reliability upgrade that helps your BMW maintain consistent performance lap after lap and mile after mile.

What you get from this cooling system

• Stabilises engine coolant temps under heavy load and repeated acceleration
• Helps minimise power fade in summer conditions and stop start traffic
• Ideal for tuned and fast road setups that demand dependable temperature control
• Designed for straightforward installation on BMW F Series B48 and B58 models
• Track-proven consistency for drivers who want reliable performance

Compatible BMW models

Suits popular B48 and B58 variants, commonly fitted to BMW M140i, M240i, 340i, 440i, 230i, 330i and 430i on chassis codes F20, F21, F22, F30, F31 and F32. If your car is outside this list or you want to double check fitment for build date or specific spec, contact us and we will confirm before purchase.

Why enthusiasts choose this kit

• Proven on road and track by our team and happy customers
• Improves thermal efficiency for confident driving on remapped cars
• Supports reliable daily use as well as weekend track work

Fitting and support

Professional installation recommended. MJ Modifications offers expert fitting in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Search-friendly terms to help you find the right part

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Buy with confidence

• Used by our team with excellent real world results
• Honest advice from BMW enthusiasts who understand B48 and B58 platforms
• Support for stock and remapped setups

Choose the MMR Competition Radiator Kit to keep your BMW’s temperatures controlled and its performance consistent on the road and on circuit. A dependable cooling system upgrade that delivers peace of mind and repeatable power when it matters.