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

The factory oil cooler wasn't built for the track — a few hard laps is enough to push oil temps into dangerous territory and put your engine at risk.

CSF and Rogue Engineering built this cooler to fix that without complicating your install. At 243 cubic inches, it's over 2x the size of the OEM unit (103 ci), keeping oil temps cool and consistent even at the limit on the hottest track days.

A Bar & Plate core in a top/bottom dual-pass layout replaces OEM's tube-and-fin design, standing up better to debris at speed. Extruded, fully TIG-welded end tanks outlast OEM's mechanically jointed, tack-welded construction. It's a true bolt-on — works with your factory radiator or CSF's High-Performance Radiators (E46 M3 #7058 / E39 M5 #7064) and reuses factory oil lines, no modifications needed.

Features

• Co-developed and track-proven with Rogue Engineering
• Dual-pass top/bottom design for maximum surface area and flow
• Drop-in fit, no modifications, uses factory oil-line connections
• Fully TIG-welded extruded end tanks (vs. OEM tack-welded joints)
• Precise OEM bumper contour — clears aftermarket splitters
• Turbulated Bar/Plate core, 8 rows, high-density louvered fins
• Compatible with OEM brackets or CSF's Triple-Pass Radiator (#7058)
• Motorsport Silver finish

Fitment