The Cummins Big Cam III is a reliable and efficient product that fits most Cummins Big Cam III makes and models. With its 4-2/3" multi-groove pulley and 4" impeller, this vented product ensures optimal performance. It is compatible with NTC300, 350, 400, Formula 300, 350, 400, 475 engines. The OEM pump number is 3004923, and the OEM casting number is 218274. Designed for practicality, this product offers excellent functionality and is sold individually. Trust the Cummins Big Cam III for a dependable and high-performing solution for your engine needs.