CSF Charge Cooler Water Radiator - Black - B58 & B48

Stop heat soak, keep the power. The CSF black low temperature heat exchanger is the ultimate front-mount cooling upgrade for BMW B58 and B48 F series cars.

Remapped turbo BMWs generate serious heat, especially on fast road, track days and summer driving. That heat steals power and consistency. This CSF unit massively improves coolant-to-air intercooler efficiency, stabilising intake temps for harder, longer pulls with repeatable performance. We run this on our own cars and our customers love the difference in on-road punch and lap-to-lap consistency.

Why upgrade

• Reduce heat soak and keep intake temps under control
• Unlock consistent performance for tuned B58 and B48 engines
• Direct-fit, no cutting or trimming, OEM-style quick connects
• Stealth black finish for a factory look behind the grille

Key tech

• 68 mm dual-row core - the largest 2-row core available in this application, maximising cooling surface area without modification
• Triple-pass internal flow - coolant traverses the core three times for superior temperature drop
• CSF B-Tube technology - optimised tube shape increases heat transfer efficiency versus conventional O-tube designs while remaining lightweight and strong
• CNC machined quick-connect fittings - true plug-and-play with factory hoses
• Removable rock guard - OE-style protection for daily use and motorway debris

Perfect for

• BMW F series cars running Stage 1 or Stage 2 software
• Hybrid turbo and high-boost builds seeking stable IATs
• Track, drag strip and spirited road driving where the stock auxiliary radiator struggles

Features at a glance

• Direct replacement intercooler radiator for water-to-air systems
• No modifications required, fully reversible
• OEM-style fitment, xDrive compatible
• Available finishes: Black or Polished Silver

Compatibility

B58 and B48 powered BMW F series platforms, including:

• 2015-2018 1 Series: 120i, 125i, M140i, M140ix (F20, F21)
• 2015-2018 2 Series: 220i, 230i, M240i, M240ix (F22, F23)
• 2014-2018 3 Series: 320i, 320ix, 330e, 330i, 330ix, 340i, 340ix (F30, F31)
• 2015-2018 3 Series Gran Turismo: 320i GT, 330i GT, 340i GT and xDrive variants (F34)
• 2015-2018 4 Series: 420i, 420ix, 430i, 430ix, 440i, 440ix Coupe, Convertible, Gran Coupe (F32, F33, F36)

OEM cross-reference: 17118741830

What enthusiasts search for

BMW B58 heat exchanger, B48 intercooler radiator upgrade, F30 low temp radiator, M140i front mount heat exchanger, M240i auxiliary radiator, F32 uprated cooling, 340i intercooler coolant radiator, 440i LT radiator, BMW water-to-air intercooler radiator, track day cooling upgrade for BMW F series.

Fitting and support

Professional installation recommended. We offer supply and fit at MJ Modifications in Warwickshire. For a tailored installation quote and lead times, email info@mjmodifications.co.uk.

In stock and proven on our own builds, this CSF upgrade is a must-have for anyone chasing reliable power and cooler charge temps on B58 and B48 BMWs.