CSF Cooling 8032 Race-Spec Dual-Pass Oil Cooler for BMW E46 M3 E39 M5

BMW E46 M3 / E39 M5 Race-Spec Dual-Pass Oil Cooler While the E46 M3 and E39 M5 come with a factory oil cooler, it was obviously not designed for high performance driving. Just a few minutes on the track quickly shows how inadequate the factory cooler is. Dangerously high oil temperatures can lead to serious damage to your engine and need to be addressed. Designed, Developed, and Track Proven in Collaboration with BMW M3 Tuning Specialist and Parts Manufacturer, Rogue Engineering Replaces OEM Unit Single-Pass Design and Plastic Shroud with a Unique Top/Bottom Dual-Pass Design for Maximum Surface Area and Flow "Drop-in Fit" Requiring No Modifications to Install - Accepts Factory Oil-Line Connections Fully TIG-Welded Extruded-Endtank Design vs. OEM Mechanically Jointed and Tack-Welded Design for Superior Reliability & Durability Fits Precisely with the Contour of the OEM Bumper - No Issues with Aftermarket Splitter Attachment