For high-performance and long-lasting durability, choose the Powerstroke Products Loaded 6.7L Cummins Head with Fire Rings. This brand new casting arrives fully assembled for your convenience, and includes 103 lb. HD valve springs for superior strength. The head gasket and fire rings are also included, and the head is backed by a 1 year / unlimited mileage warranty. Whether you’re looking to replace an old head or upgrade your current one, the Powerstroke Products Loaded 6.7L Cummins Head with Fire Rings is the ideal choice.