Manley Chevrolet Small Block Exhaust Valve Kit - 1.625in Head Dia. 5.265in O/A Length, 0.3415in Stem

This kit includes a set of Manley Performance Extreme Duty Series exhaust valves, designed for high-performance Chevrolet Small Block engines. Each valve features a 1.625-inch head diameter, a 5.265-inch overall length, and a 0.3415-inch stem diameter. These valves are specifically crafted for applications that experience extreme force and high heat, making them a solid choice for serious engine builds.

The XH-432 XtremeAlloy material used in these valves is a key component for handling the intense conditions found in racing, such as Top Fuel and Funny Car drag racing, as well as demanding marine engine uses. To ensure they stand up to the rigors of these applications, Manley has equipped them with chrome stems and hard tips. This combination offers exceptional longevity and wear resistance, crucial for maintaining performance over time. Furthermore, the swirl-polished under-head areas and fully machined combustion faces are designed to improve airflow into the cylinder and contribute to more efficient combustion.

When you're building an engine that needs to perform under pressure, parts like these exhaust valves are critical. Their robust construction and specialized materials mean they're built to last in specialized, high-stress environments. If you're working on a restricted carburetor circle track engine or any application where extreme heat and force are a constant factor, these valves are a well-built option to consider for your build.