The CSF 99-03 BMW M5 (E39) / 95-03 BMW 540i M/T Radiator is a direct-fit, high-performance radiator designed to fit 1995 - 2003 BMW M5 (E39) and BMW 540i models with manual transmissions. It has been modified with a drain plug for compatibility with automatic transmissions, and is constructed from aircraft-grade aluminum for maximum durability and corrosion resistance. The radiator features a 3-row core design for superior cooling, and is designed to provide superior cooling performance and reliability.