CSF 7058 Radiator for BMW M3 (E46) 2000-2006

Part number7058

With over fifty years of experience in radiator manufacturing, CSF is the obvious choice when it comes to keeping your BMW E46 M3 engine cool and performing at its peak. Designed for track-day or track use, this high-performance, all-aluminum radiator is a must-have for both high-performance street cars and race cars that require enhanced cooling efficiency in motorsport conditions. The three-pass flow structure allows coolant to pass through the radiator core three times before exiting, ensuring minimal outlet temperatures. This radiator features a 2-row core with CSF's exclusive B-Tube technology: Unlike conventional 'O' style oval radiator tubes, CSF utilizes specially designed 'B' shaped tubes. These B-tubes are carefully drawn and then seam-soldered for sealing. CSF can use thinner, lighter aluminum material (with greater cooling efficiency) because this design is actually stronger than conventional 'O' style welded tubes. The design (inlet opening in the middle of the tube, seam-soldered) increases the heat exchange surface area of the tubes by approximately 15% compared to conventional tubes – the efficiency of two smaller tubes compared to one larger tube within the same space criteria. With the B-tubes, a "dual-core laminar flow" can be achieved. CSF also uses hyper-efficient fin stocks that are carefully and precisely aligned to maximize airflow through the radiator core. The fin characteristics are carefully measured and calculated for each application and tested for maximum heat dissipation efficiency in a wind tunnel lab.

The CSF radiator for the BMW E46 M3 is a true "drop-in fit" design, requiring no modifications for installation. OE-style mounting brackets are CNC-machined and TIG-welded for maximum strength. The inlet/outlet connections are designed to match the original connections, allowing you to use OEM or aftermarket hoses.