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The CSF all-aluminum radiator for 1997–2002 Audi S4 (B5) is a direct-fit replacement built for improved cooling on street or track. It combines a 2-row 42mm core with CSF's B‑Tube technology and a multi-louvered fin design to increase heat transfer surface area. CNC‑machined brackets and quick‑connect inlet/outlet connections match OEM components for an easy drop-in installation.
CSF 97-02 Audi S4 (B5) Radiator
