CSF 08-14 Subaru WRX / STI / 15-21 WRX 1-Row 31mm High-Performance Radiator – Black

With over five decades of specialized experience in radiator manufacturing, CSF stands as a leader in delivering high-quality cooling solutions. The CSF 08-14 Subaru WRX / STI / 15-21 WRX 1-Row 31mm High-Performance Radiator in black is engineered to meet the demanding cooling requirements of both street and track environments, ensuring your Subaru performs at its peak under all conditions. This radiator is designed with a focus on durability, efficiency, and seamless integration. It features a 2-Row core utilizing CSF’s proprietary B-Tube Technology, which distinguishes it from conventional radiators that employ oval-shaped “O” tubes. Instead, CSF’s “B” shaped tubes are precision-formed and seam-brazed, allowing the use of thinner and lighter aluminum that enhances cooling efficiency without compromising structural integrity. This innovative design increases the heat transfer surface area by approximately 15% compared to standard tubes, effectively delivering the cooling capacity of two smaller tubes within the same spatial constraints. The dual liquid laminar flow enabled by the B-tubes optimizes coolant circulation, which is critical for maintaining engine temperatures during high-performance operation. Complementing the advanced core design, the radiator incorporates ultra-efficient 6.5mm tall multi-louvered fins. These fins are meticulously aligned to maximize airflow through the core, enhancing heat dissipation. Each fin specification is carefully calculated and validated through rigorous testing in CSF’s wind-tunnel laboratory, ensuring optimal thermal performance and reliability. The CSF WRX/STI radiator is a true “Drop-in fit” component, engineered to require no modifications during installation. This ensures a straightforward replacement process, preserving the original vehicle setup. The mounting brackets are CNC machined and welded to provide exceptional strength and durability, while the inlet and outlet connections are designed to match OEM specifications. This compatibility allows for the reuse of original hoses or aftermarket alternatives, offering flexibility and convenience for the installer. Key Features High-Performance Core with CSF’s Exclusive B-Tube Technology for Enhanced Cooling Efficiency Ultra-Efficient 6.5mm Tall Multi-Louvered Fins Maximizing Surface Area Contact and Airflow 100% All-Aluminum TIG-Welded Construction Ensuring Durability and Lightweight Design CNC Machined Mounting Brackets for Precise Fitment and Long-Term Reliability Innovative “Multi-Fit” Combo Pipe and Plug Design Included for Versatile Installation True “Drop-in Fit” Design Requiring No Modifications for Easy Installation Individually Leak and Pressure Tested to Guarantee Quality and Performance Black Finish Providing a High-End Stealth Appearance Designed for Manual Transmission Applications Only Supersedes CSF Part Number #7028 This radiator is suitable for a wide range of Subaru models, including but not limited to the 2008-2014 WRX and STI, as well as the 2015-2021 WRX. Its robust design and precise engineering make it an ideal upgrade for enthusiasts seeking improved cooling performance in both daily driving and competitive motorsport scenarios. Applications Year Range Make Chassis Code Model Trim Engine / Trans / Etc Notes 2016-2017 Subaru GT Crosstrek – H4 – 2016 Subaru GT Crosstrek Hybrid H4 – 2016 Subaru GT Crosstrek Hybrid Touring H4 – 2016-2017 Subaru GT Crosstrek Limited H4 – 2016-2017 Subaru GT Crosstrek Premium H4 – 2016-2017 Subaru GT Crosstrek Sport H4 – 2016-2017 Subaru GT Crosstrek Touring H4 – 2009-2013 Subaru 3rd Gen Forester X H4 (Manual) – 2009-2013 Subaru 3rd Gen Forester X Premium H4 (Manual) – 2009-2013 Subaru 3rd Gen Forester X Touring H4 (Manual) – 2009-2010 Subaru GR/GV Impreza 2.5 GT Turbocharged 2.5L H4 (Manual) – 2008-2016 Subaru GR/GV