CSF B58 / B48 All Aluminium Heat Exchanger Upgrade for BMW G20 G21 3 Series and G29 Z4, plus A90/A91 GR Supra
Keep intake temps under control and power consistent with the CSF all aluminium Heat Exchanger upgrade for B58 and B48 engines. Perfect for tuned BMW G20/G21 320i, 330i, M340i and G29 Z4 20i, 30i, M40i, and also compatible with the 2020+ Toyota GR Supra A90/A91. If you’re running Stage 1, Stage 2 or a big-turbo Stage 3, this CSF heat exchanger is the proven cooling upgrade that maintains low charge temps, reduces heat soak and safeguards horsepower on the street, track or drag strip.
Heat is the enemy of performance. Increase boost and you increase heat in the charge air system. The stock heat exchanger and charge cooler work fine at factory boost, but once tuned they can struggle, leading to higher IATs, timing pull and reduced power. The CSF Heat Exchanger upgrade increases the efficiency of the charge cooling system by improving the cooling of the water that feeds the manifold-mounted charge cooler, delivering significantly lower and more stable intake air temperatures for longer. Expect around 5–15°C lower charge temps depending on tune level and use case.
At Nforcd we’ve fitted and used this CSF heat exchanger on our own builds and customer cars with excellent results. Customers consistently report faster recovery from heat soak, stronger back-to-back performance and improved reliability when tuned.
Why choose the CSF Heat Exchanger?
- Significantly reduces Intake Air Temperature (IAT) for maximum and repeatable performance with faster heat soak recovery
- Improves airflow to the rest of the cooling stack for lower engine water temps and engine oil temps
- 2-row, 42 mm ultra high-performance core with CSF’s exclusive B-Tube technology
- 6.5 mm tall multi-louvered fins for superior heat dissipation
- 100% all aluminium TIG-welded construction for strength and durability
- CNC machined mounting brackets and OEM-style quick-connect inlet/outlet
- Includes rock guard and transmission oil cooler mounting kit (industry exclusive)
- Drop-in, plug-and-play fitment
- Hand-polished “mirror finish” (approx. 1 hour polish)
- Tested and proven by CSF’s global R&D partners across USA, UK and China
- Backed by a 2-year limited warranty
Ideal for tuned B58 and B48 engines
The CSF heat exchanger is a must for remapped and hybrid-turbo cars seeking reliable cooling. Whether your BMW M340i B58, 330i B48 or Toyota Supra B58 is used for spirited road driving, track days or drag racing, this front-mount heat exchanger helps maintain power run after run by keeping charge temps low and stable.
Compatibility and fitment
- Toyota GR Supra A90/A91 (2020+)
- BMW G29 Z4 20i, 30i, M40i
- BMW G20 3 Series: 320i, 330i, 330i xDrive, M340i, M340i xDrive
- BMW G21 3 Series Touring: 330i, 330i xDrive, M340i xDrive
- Engines: B58 and B48
Cross-reference OEM numbers
- OEM: 16400-WAA03 (Toyota)
- OEM: 17118666811 (BMW)
Popular search terms
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Installation and fitting
This is a direct replacement, drop-in unit using OEM-style quick connects. Professional fitting recommended. For installation by specialists, choose Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com.
Buy with confidence
Proven performance, robust construction and real-world testing make the CSF All Aluminium Heat Exchanger the go-to cooling upgrade for tuned BMW B58/B48 and Toyota Supra platforms. Order now to keep intake temps low, power high and performance consistent.