CSF Cooling 8258 High-Performance Auxiliary Radiator for BMW F8X M3/M4/M2 Comp

BMW F8X M3/M4/M2 Comp High-Performance Auxiliary Radiator Like the other cooling systems on the F8X, the factory auxiliary radiators do a pretty good job in stock form. However, once you start adding a lot of power and pushing the car in aggressive driving conditions, the factory systems start to show its limitations. As more and more owners have pushed the limits of their S55, CSF saw the need and demand. The F8X platform is also almost a decade old with the newest examples being at least 5 years old. Over time the original coolers end up with damaged or clogged fins that greatly reduce their cooling capacity. Sold Individually - all applications require 2 auxiliary radiators Multi-Fit - Fits Both Left & Right Side 2-Row 42mm High-Performance Core Featuring CSF's B-Tube Technology 2026 Update: New "Track-Spec" 5mm Tall Ultra Efficient Fins with a Multi-Louvered Design for Maximum Surface Area Contact and Heat Dissipation Tank Volume increased by 10% and Core Size Increased by 6.4%