CSF BMW F2X 1/2-Series / F3X 3/4-Series (AT) High-Performance All-Aluminum Radiator

With over five decades of expertise in radiator manufacturing, CSF stands as a trusted leader in delivering high-performance cooling solutions. The CSF BMW F2X 1/2-Series / F3X 3/4-Series (AT) High-Performance All-Aluminum Radiator exemplifies this legacy by combining advanced engineering with durable materials to ensure optimal engine cooling and reliability for your BMW. Engineered specifically for the F2X and F3X chassis equipped with automatic transmissions, this radiator is designed to meet the rigorous demands of both street driving and competitive motorsports. Whether your vehicle is a high horsepower build or a race-prepared machine, maintaining efficient thermal management is critical, and CSF’s radiator provides the enhanced cooling capacity necessary to protect your engine under strenuous conditions. At the core of this radiator’s superior performance is CSF’s exclusive B-Tube Technology. Unlike conventional oval-shaped “O” type tubes, the B-Tubes are uniquely shaped and seam-brazed to create a stronger, lighter, and more thermally efficient structure. This innovative design allows the use of thinner aluminum material, which not only reduces weight but also improves heat dissipation. The B-Tube’s inlet positioned centrally along the seam increases the heat transfer surface area by approximately 15% compared to traditional tubes, effectively delivering the cooling efficiency of two smaller tubes within the same spatial constraints. Moreover, the B-Tube configuration facilitates dual liquid laminar flow, enhancing coolant circulation and heat rejection. Complementing this technology are ultra-efficient multi-louvered fins, precisely aligned to maximize airflow through the radiator core. Each fin’s specifications—including a 6.5mm fin height—are meticulously engineered and validated through wind tunnel testing to ensure maximum heat rejection efficiency, contributing to the radiator’s ability to maintain optimal engine temperatures even in demanding environments. The CSF F2X/F3X radiator is designed as a true “drop-in fit” replacement, requiring no modifications during installation. This ensures a seamless integration with your vehicle’s existing cooling system components. The radiator features CNC-machined and welded OE-style brackets for enhanced durability and precise fitment. Inlet and outlet connections are engineered to match OEM specifications, allowing the reuse of original or aftermarket hoses without compromise. Key Features 2-Row 42mm Core (Dual Core) incorporating CSF’s proprietary B-Tube Technology for superior strength and cooling efficiency Ultra-efficient multi-louvered fins with 6.5mm fin height, optimized for maximum surface area contact and airflow CNC-machined “quick-connect” inlet and outlet connections for precise fit and ease of installation Robust CNC-machined brackets and fittings, ensuring exceptional durability and alignment All-aluminum race-style drain plug designed for reliability and ease of maintenance Refined smooth satin finish for corrosion resistance and professional appearance True “drop-in fit” design compatible with all OEM components including quick-connect hoses, AC condenser, mounting brackets, and fan shroud Direct replacement for OEM part number 17117618807, ensuring compatibility and performance Applications Year Range Make Chassis Code Model Trim Engine / Trans / Etc Notes 2014-2016 BMW F22/F23 228i – Turbocharged 2L L4 (Automatic) – 2015-2016 BMW F22/F23 228i xDrive – Turbocharged 2L L4 (Automatic) – 2012-2018 BMW F3X 320i – Turbocharged 2L L4 (Automatic) – 2013-2018 BMW F3X 320i xDrive – Turbocharged 2L L4 (Automatic) – 2012-2016 BMW F3X 328i – Turbocharged 2L L4 (Automatic) – 2013-2016 BMW F3X 328i xDrive – Turbocharged 2L L4 (Automatic) – 2012-2015 BMW F3X 335i – Turbocharged 3L L6 (Automatic) – 2013-2015 BMW F3X 335i xDrive – Turbocharged 3L L6 (Automatic) – 2014-2016 BMW F3X 428i – Turbocharged 2L L4 (Automatic) – 2015-2016