The original OE radiator from BMW is a plastic tank with a single row aluminum core design. While this is generally accepted as good quality and durable, there is always room for improvement. The 4.5mm fins on the OE radiator made the system fairly efficient for a factory unit. The core itself is one of the biggest limiting factors at only 34mm thick and a single cooling row. The CSF radiator features the latest 5mm fin technology. These fins significantly increase the heat exchange surface area improving overall cooling efficiency and recovery while still maintaining good airflow. The core is much larger than the factory featuring 2-Row 42mm aluminum core. This both increases the fluid capacity of the radiator, and improves the cores ability to dissipate heat. CSF’s Exclusive B-Tube Technology increases the heat transfer by approximately 15% over regular oval welded tubes. In addition, the super-efficient multi-louvered fins maximize airflow through the core for the best possible performance. The TIG-Welded 100% All Aluminum construction increases the overall strength of the radiator. This improves durability and longevity so you can be confident it will hold up to hard driving conditions. The CSF radiator mounts in the factory location and requires no modifications or cutting. While the 6.5mm fin version performed extremely well in testing, CSF always seeks to offer the ultimate cooling solution. Before going into final production the design was updated to incorporate CSF’s latest 5mm fin technology which was introduced at the end of 2023. This new core specification offers even more heat transfer area and thermal efficiency than the tested prototypes. CSF is confident this radiator is ready to take on the most demanding racing conditions in the world. - 2-Row – 42mm Ultra-High-Performance Core - Cooling Tubes with CSF’s Exclusive B-Tube Technology - New 5mm Tall Ultra Efficient Fins with a Multi-Louvered Design for Maximum Surface Area Contact - CNC Machined Mounting Brackets and OEM Style Inlet/Outlet - 100% All Aluminum TIG-Welded Construction - Hand Brushed Satin Finish - True Plug-and-Play “Drop-in Fit” Installation Requires Absolutely No Modifications - Individually Leak and Pressure Tested - 2-Year Limited Warranty

Applications: - BMW F3X 340i (incl. xDrive) 2016-2019 - BMW F3X 440i (incl. xDrive) 2017-2020 - BMW F2X M240i (incl. xDrive) 2017-2021 - BMW F2X M140i (incl. xDrive) 2016-2019 - BMW F3X 330i with M Sport Package (incl. xDrive) 2017-2019 - BMW F3X 430i with M Sport Package (incl. xDrive) 2017-2020 - BMW F2X 230i with M Sport Package (incl. xDrive) 2017-2020

OEM Part Numbers: - BMW: 17118482623