3945361 water pump is a dedicated replacement for Cummins NH220 diesel engine. It adopts high-quality cast iron housing, durable mechanical seal and high-precision impeller to ensure efficient coolant circulation. It keeps engine working temperature stable and avoids overheating damage under heavy load. All mounting positions and interfaces are consistent with original parts for quick assembly. Fully tested before delivery, it meets OEM performance standards for professional engine overhaul and repair work.