CSF B58 | B48 Charge Cooler Water Radiator Heat Exchanger Upgrade for BMW M140i, M240i, 340i, 440i
The CSF Charge Cooler Water Radiator, also known as the CSF Heat Exchanger, is the go-to cooling upgrade for BMW B58 and B48 engines. Ideal for tuned and remapped cars running Stage 1 or Stage 2, this high performance chargecooler radiator keeps intake air temperatures under control, fights heat soak and delivers consistent power on the road and on track. Perfect for BMW M140i, M240i, 340i and 440i owners who want reliable cooling, improved performance and a direct-fit solution with zero cutting.
We have used this CSF heat exchanger on customer cars and the feedback has been excellent. Lower IAT, faster recovery between pulls and rock-solid cooling performance during spirited driving and track days. If you are chasing more reliable power from your B58 or B48, this is the charge cooler radiator upgrade you want.
Why upgrade the BMW charge cooler radiator
The factory heat exchanger is adequate on a stock car, but as soon as you increase boost, remap or add bolt-ons, intake temperatures rise quickly. Hotter air is less dense, power drops and the ECU will pull timing to protect the engine. Upgrading to the CSF B58 B48 charge cooler water radiator dramatically improves heat rejection, keeps intake temps stable and helps your BMW M140i, M240i, 340i or 440i deliver repeatable performance with reduced risk of heat soak.
CSF performance features
- World's largest 2-row core at 68 mm thickness for maximum cooling capacity
- Triple Pass design routes coolant through the core three times for lower outlet temps
- CSF B-Tube technology increases efficiency by around 15 percent compared with standard O-Tube designs
- Lightweight yet strong core for improved heat transfer and durability
- Direct fit with zero modifications required, truly plug and play
- CNC machined quick-connect fittings for factory-style installation
- Removable rock guard like the OE part to protect the core
- Available in Polished Silver or Black to suit your build
Benefits you will feel
- Lower intake air temperatures and reduced heat soak
- More consistent power during hard driving, remapped and tuned setups
- Improved reliability for daily use, fast road and track days
- Optimised cooling for Stage 1 and Stage 2 B58 and B48 builds
Fitment and compatibility
Direct replacement charge cooler water radiator for B58 and B48 BMW models:
- 15-18 BMW 120i, 125i, M140i(x) (F20)
- 15-18 BMW 120i, 125i, M140i(x) (F21)
- 15-18 BMW 220i, 230i(x), M240i(x) (F22)
- 15-18 BMW 220i, 230i(x), M240i(x) (F23)
- 14-18 BMW 320i(x), 330e, 330i(x), 340i(x) (F30)
- 14-18 BMW 320i(x), 330i(x), 340i(x) (F31)
- 15-18 BMW 320i(x) GT, 330i(x) GT, 340i(x) GT (F34)
- 15-18 420i(x), 430i(x), 440i(x) (F32)
- 15-18 BMW 420i, 430i(x), 440i(x) (F33)
- 15-18 BMW 420i(x), 430i(x), 440i(x) Gran Coupe (F36)
OEM part reference: 17118741830
Installation and support
This CSF heat exchanger is a direct-fit upgrade that requires no cutting or permanent modifications. For professional fitting, book with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.
Ideal search terms
CSF B58 charge cooler, CSF B48 charge cooler, BMW M140i heat exchanger, BMW M240i charge cooler radiator, BMW 340i heat exchanger upgrade, BMW 440i chargecooler, B58 intercooler upgrade, B48 intercooler upgrade, triple pass radiator, 68 mm dual row core, B-Tube technology, BMW F20 F21 F22 F23 F30 F31 F34 F32 F33 F36 cooling upgrade, intake air temperature reduction, heat soak fix, track day cooling, direct fit plug and play heat exchanger.
Choose the CSF Charge Cooler Water Radiator for your BMW B58 or B48 and enjoy dependable cooling performance, repeatable power and OE-quality fitment with premium race-bred engineering.