CSF Aluminium Performance Radiator for BMW 1M and 135i Manual
Upgrade your BMW cooling with the CSF aluminium performance radiator. This all-alloy radiator is a direct drop-in replacement for BMW 1M and 135i manual models and is engineered to keep coolant temperatures under control during fast road and track use. If you are searching for a BMW 1M radiator upgrade, BMW 135i radiator, E82 radiator, E88 radiator, E90 E92 335i manual radiator, CSF radiator or an alloy performance radiator for BMW, this is the proven solution.
Key features and benefits
- High performance all aluminium core with CSF B-Tube technology for greater surface area and superior strength
- Aluminium end tanks replace the weak OEM plastic end tanks to reduce the risk of cracks and leaks under heat and pressure
- Thicker, more efficient core for enhanced heat dissipation and improved cooling capacity on track days and spirited driving
- B-Tube design allows thinner, lighter material compared with conventional single-tube designs while maintaining strength
- Drop-in fitment using factory shrouds, hose connections and mounting points for a clean, OEM-plus installation
- Designed and tested in the USA, with wind tunnel, vibration, thermal cycle, burst pressure and salt-spray validation at CSF’s facilities
- Individually leak-tested with a 30-point inspection prior to shipping for quality you can trust
- Backed by a CSF two-year warranty
Why CSF B-Tube matters
CSF’s B-Tube radiator technology uses two tubes in a B-shaped profile instead of a single oval tube. This increases internal and external surface area for better heat transfer and creates a stronger structure. The result is a lighter yet more efficient alloy radiator that stabilises coolant temperatures and supports consistent performance.
Compatibility and fitment
Drop-in fitment to the following BMW 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 transmission models
Fitment notes: due to the thicker core, tolerances are tighter in certain areas, particularly between the expansion tank and the accessory belt. The radiator is designed to reuse the factory plastic shrouding, hose connections and mounting points.
Real-world results
We run CSF alloy radiators on our own builds and our customers have been consistently pleased with the cooling performance, reliability and peace of mind on road and track. If you want a BMW radiator upgrade that works, this CSF unit is a standout choice.
Perfect for performance use
Ideal for track day cars, fast road builds and tuned BMWs where an uprated radiator is essential. Search terms you might be looking for include BMW 1M radiator, BMW 135i radiator upgrade, E82 aluminium radiator, E88 alloy radiator, E90 E92 335i manual radiator, CSF B-Tube radiator, performance cooling and drop-in BMW radiator replacement.
Professional fitting available
Looking for installation We can supply and fit at Nforcd in Warwickshire. Request a fitting quote by emailing Sales@nforcd.com.