CSF 08-21 Subaru WRX/STI 2-Row 42mm Race-Spec All Aluminum Radiator - Black

This is a CSF 2-row, 42mm all-aluminum radiator, finished in black, designed for 2008-2021 Subaru WRX and STI models, as well as a range of other Subaru vehicles like the Crosstrek, Forester, Impreza, Legacy, and Outback. If you're pushing your Subaru hard, whether on the street or the track, keeping your engine cool is critical. A high-performance radiator like this one is essential for maintaining optimal engine temperatures, especially in modified or race applications where the stock cooling system might not keep up.

CSF builds these radiators with their exclusive B-tube technology. Unlike standard oval tubes, these B-tubes are seam-brazed and have a unique shape that increases the heat transfer surface area by about 15%. This design allows for a dual liquid laminar flow, essentially giving you the cooling efficiency of two smaller tubes in the same space. They also use multi-louvered fins that are precisely aligned to maximize airflow and heat rejection, all tested in a wind tunnel. The core is 100% all-aluminum and TIG-welded for durability, and the mounting brackets are CNC machined to ensure a true drop-in fit, meaning no modifications are needed for installation. You can reuse your OEM hoses and connections.

This radiator is specifically for manual transmission vehicles. It's a well-built component from a company with over 50 years of experience in radiator manufacturing, designed to handle the demands of performance driving.