Manley Chevrolet Big Block 1.900in Head Dia. 5.422in O/A Length Race Series Exhaust Valves -Set of 8

Manley Performance is well-known for making strong engine components, especially for racing applications. These Race Series exhaust valves are a prime example, built for engines that see serious use, like those in bracket, drag, and oval track racing, especially when operating under 8000 RPM. They feature a 1.900-inch head diameter and a 5.422-inch overall length, designed to fit Chevrolet Big Block engines.

These valves are constructed from high-quality stainless steel, which gives them solid durability. The stems are chromed and have hard tips to help them last longer and resist wear, even with frequent use. The area under the head is swirl polished, and the combustion faces are fully machined. This design helps improve airflow into the cylinder and makes combustion more efficient. They are also recommended for use in alcohol engines, showing their ability to handle demanding conditions reliably.