CSF BMW B58 Gen 2 M240I/M340I/M440I/Supra High-Performance Radiator

CSF is well known for making the best MK5 A90 Toyota GR Supra and BMW G-Series B58 cooling systems on the market, with years of feedback from customers, race teams, and development partners giving CSF more B58 cooling experience than any other company in the world. With enthusiasts, tuners, and race teams pushing these cars further than anyone originally anticipated, this High-Performance All-Aluminum Radiator completes the full cooling suite alongside CSF's well-known heat exchanger and auxiliary radiator products for this platform.

With more and more people pushing the limits of the Supra and its BMW siblings, the factory radiator has started showing its limitations. Increased boost and upgraded turbos generate significantly more heat, and combined with the heat exchanger mounted in front of the radiator, engine coolant temperatures can climb too high, especially during track use, where it can trigger limp mode. CSF's replacement uses a 2-row, 42mm aluminium core built around their exclusive B-Tube technology, increasing heat transfer surface area by approximately 15% over regular tubes for genuine dual liquid laminar flow. This is a true drop-in fit, using CNC-machined mounting brackets and OEM-style connections, with no modifications required to install.

Works with: OEM mounting location and connections. Complements CSF's Front Mount Heat Exchanger and Auxiliary Radiator for a complete B58 Gen 2 cooling overhaul.

Why Choose This Radiator

• CSF's exclusive B-Tube core technology, approximately 15% more heat transfer than regular tubes
• Genuine drop-in fit, no modifications required for installation
• CNC-machined mounting brackets and OEM-style connections for precise fitment
• Addresses genuine coolant temperature limitations that emerge with tuning or track use
• Part of CSF's full B58 Gen 2 cooling suite, developed with extensive real-world racing feedback
• 100% all-aluminium, TIG-welded construction for genuine long-term durability

Compatibility

• BMW G20/G21 M340i (B58 Gen 2)
• BMW G22/G23/G26 M440i (B58 Gen 2)
• BMW G42 M240i (B58 Gen 2)
• Toyota GR Supra A90/A91 (B58 Gen 2)