CSF 7064 Radiator for BMW M5 (E39) 1999-2003

Part number7064

With over fifty years of experience in radiator manufacturing, CSF is the obvious choice when it comes to ensuring your BMW E39 M5/540i's engine cooling and maximum performance. Designed for track or street use, this high-performance all-aluminum radiator is a must-have for both high-horsepower vehicles and race cars that require additional cooling efficiency in motorsport conditions. This radiator features a 2-row core with CSF's exclusive B-Tube Technology: Unlike conventional "O" style radiator oval tubes, CSF uses specially designed "B" shaped tubes. These B-tubes are meticulously formed and then seam-soldered to seal them. CSF can utilize 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 surface area of the tubes' heat exchange by approximately 15% compared to conventional tubes – the efficiency of two smaller tubes compared to one larger tube under the same space criteria. With B-tubes, "dual-row laminar flow" can be achieved. CSF also utilizes highly efficient fin stocks that are carefully and precisely aligned to maximize airflow through the radiator core. Fin characteristics are meticulously measured and calculated for each application and tested for maximum heat dissipation efficiency in a wind tunnel laboratory.

The CSF Radiator for the BMW E39 M5/540i is a true "Drop-in fit" design, requiring no modifications for installation. OE-style mounting brackets are CNC-machined and welded for maximum strength. The inlet/outlet spigots are designed to match the original spigots, so you can use OEM or aftermarket hoses. Trust the cooling experts at CSF for the most efficient, high-quality, and reliable radiators.