CSF 00-06 BMW M3 (E46) Race-Spec Dual-Pass Oil Cooler

When you're pushing your 2001-2006 BMW M3 to its limits, especially on the track, keeping oil temperatures in check is crucial for engine health. The CSF Race-Spec Dual-Pass Oil Cooler is designed to replace your factory unit, which wasn't built for high-performance driving. This cooler is over twice the size of the stock one, boasting a volume of 243 cubic inches compared to the factory's 103 cubic inches. This significant increase in size allows for cooler, more consistent oil temperatures, even on the hottest days and during demanding driving sessions.

This oil cooler features a robust Bar & Plate construction, which is much stronger and more resistant to damage from road debris than the tube-and-fin design. The end tanks are extruded, creating a more durable unit than the mechanically joined and tack-welded construction found on the OEM cooler. Developed in collaboration with Rogue Engineering, a specialist in BMW M3 tuning, this cooler is track-proven and built to withstand rigorous use. It's designed as a direct bolt-on replacement for the factory radiator or CSF's own high-performance radiators, and it uses the factory oil cooler lines, making installation straightforward without requiring modifications.

The unique top/bottom dual-pass design maximizes surface area and flow, while the turbulated heavy-duty bar/plate construction ensures reliability and durability. It fits precisely with the contour of the OEM bumper, so you won't have issues with aftermarket splitter attachments. The cooler is finished in a motorsport silver, giving it a clean look under the hood.