Manley Big Block Chevy Stock 3/8in Stem Diameter Race Flo Exhaust Valves (Set of 8)

You're getting a set of eight Manley Race Flo exhaust valves, designed for Big Block Chevy engines. These valves are built to handle the stress of racing applications, specifically for engines running up to 8000 RPM. They feature a 3/8 inch stem diameter, which is the stock size for many Big Block Chevy applications, making them a straightforward replacement when you're rebuilding your top end.

Manley constructs these exhaust valves from XH-426 stainless steel, a well-built material chosen for its durability in high-heat environments. The stems are chrome-plated for improved wear resistance, and the tips are hardened to stand up to repeated valve action. The under-head area is swirl polished to help smooth airflow into the cylinder, and the combustion face is fully machined to optimize how the fuel and air mixture burns. These are also the recommended exhaust valves if you're running an alcohol-based fuel, which tends to be harder on components.