CSF Race-Spec Dual-Pass Oil Cooler - E46 M3

CSF is a leader in automotive cooling technology, with over a half-century of experience. Using that knowledge, they have developed this high oil cooler that far surpasses the abilities of the stock unit. Starting with a eight-row design, this oil cooler features a high-quality, fully TIG-welded tapered extruded end tank that fits perfectly behind the bumper with no cutting necessary. If you're serious about, upgrade your oil cooler with this quality part from CSF.