CSF 07-13 BMW M3 (E9X) Triple Pass Radiator

The CSF High-Performance All-Aluminum Triple Pass Radiator for the 2007-2013 BMW M3 (E9X) delivers serious cooling performance for the street, track, and high-horsepower builds. Designed for motorsport conditions, the Triple-Pass Flow Structure routes coolant through the core three times, significantly lowering outlet temperatures and maximizing cooling efficiency.

CSF’s exclusive B-Tube Technology features a 2-row core with thinner, lighter aluminum construction that increases heat transfer surface area by up to 15% over standard designs. Paired with ultra-efficient, multi-louvered fins, this radiator is engineered to deliver superior airflow and cooling capacity. Precision-fit and wind-tunnel tested, it’s a must-have for anyone pushing the limits of the E9X M3 platform.