Outfit your semi to be Ready for the Road Ahead with enhanced engine safety and performance, with the AFA Industries Engine Cylinder Head Gasket Set. By utilizing a sophisticated design, this replacement piece is able to seal an engine's combustion chambers, preventing compression loss while allowing coolant to flow between the engine block and cylinder heads. Built with durable materials to maintain a tight seal under extreme temperatures and pressures. FleetPride is your First Click in Heavy Duty .