Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem

This kit includes Manley's Race Series exhaust valves, designed for Chevrolet big block engines. These valves are built to handle the demands of racing applications, including bracket, drag, and oval track use, especially in engines running up to 8000 RPM. They are also a recommended choice for exhaust valves in alcohol-fueled engines, offering solid performance where it counts.

Each exhaust valve is made from durable stainless steel, specifically XH-426 alloy, to resist the high temperatures and stresses found in performance engines. They feature chrome-plated stems and hard tips for improved wear resistance and longevity. The under-head area is swirl polished to help smooth airflow, and the combustion face is fully machined to optimize how the air and fuel mixture enters the cylinder.

With a 1.900-inch head diameter, a 5.522-inch overall length, and a 0.3415-inch stem diameter, these valves are sized for many performance big block Chevy builds. If you're rebuilding the top end of a performance engine and need reliable exhaust valves, these are a well-built option.