Product Details: The American Cylinder Head Standard Cast Iron Cylinder Head is the perfect choice for increased power output and low fuel consumption. This cylinder head is designed with stronger rib reinforcement at vulnerable cracking areas, allowing for more excellent durability and performance. The hardened steel construction ensures the engine warms up more quickly and requires a smaller radiator. With its superior design and construction, this cylinder head is an excellent choice for increased power and efficiency. FleetPride is your First Click in Heavy Duty®.