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The CSF race-spec oil cooler for 2000–2006 BMW M3 (E46) is an over-two-times-larger bolt-on replacement for the factory unit, designed with heavy-duty bar-and-plate construction and extruded end tanks for durability under track use. Developed with Rogue Engineering, it offers expanded cooling volume, an 8-row core, and a dual-pass top/bottom flow design while fitting OEM radiator brackets and using factory oil-line connections for straightforward installation.
CSF 00-06 BMW M3 (E46) Race-Spec Dual-Pass Oil Cooler
