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The CSF all-aluminum high-performance radiator for Audi Quattro B1–B4 applications is a drop-in upgrade built for street and track use. It features a 2-row dual-pass core with CSF's B-Tube technology and ultra-efficient multi-louvered fins to increase heat rejection. CNC-machined OE-style brackets, OE-matching inlet/outlet connections, and multiple fan shroud mounts deliver a plug-and-play cooling solution for higher-demand engines.
CSF Audi Classic and Small Chassis 5-Cylinder High-Performance All Aluminum Radiator
