This precision-engineered cylinder head assembly is cast from high-strength aluminum alloy and comes complete with four intake and four exhaust valves, springs, retainers, and machined combustion chambers. Its exacting tolerances ensure optimal airflow and sealing for improved power delivery, fuel efficiency, and reduced emissions. Finished with a corrosion-resistant coating and pre-assembled valve train, it’s a direct-fit replacement designed to withstand high‐temperature, high‐pressure environments and deliver reliable performance mile after mile.