Manley Big Block Chevrolet Extreme Duty Exhaust Valve - 5.522in Overall L 1.900in Diameter Set of 8

This set includes eight Manley Performance Extreme Duty exhaust valves, each measuring 5.522 inches in overall length with a 1.900-inch diameter. These valves are specifically crafted for high-demand applications where significant force and extreme heat are constant factors. They are a popular choice for Top Fuel and Funny Car drag racing, as well as for powerful Big Block Chevy marine engines and restricted carburetor circle track racing engines.

The core of these valves is Manley's XH-432 XtremeAlloy, a well-built material designed to withstand the intense conditions found in racing and high-performance marine use. To ensure they stand up to the rigors of operation, each valve features chrome stems and hard tips, which greatly improve longevity and resistance to wear. The design also includes swirl-polished areas under the head and fully machined combustion faces. These features work together to improve airflow into the combustion chamber, contributing to more efficient combustion and overall performance.

If you're building a high-horsepower Big Block Chevy for racing or a demanding marine application, these valves are a solid option. They are designed to handle the extreme stresses and temperatures these engines produce, offering improved durability and performance where it counts the most. Always refer to the manufacturer's installation instructions for proper fitment and assembly procedures.