Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3415in Stem

Manley Performance Products offers these Extreme Duty Series exhaust valves, specifically crafted for high-demand applications like Top Fuel and Funny Car drag racing, as well as robust Big Block Chevy marine engines. If your engine faces extreme forces and intense heat, these valves are built to handle it. They feature a 1.940-inch head diameter and a 5.422-inch overall length, with a 0.3415-inch stem diameter, making them a solid choice for rebuilding or upgrading your engine's top end.

The core of these valves is the XH-432 XtremeAlloy material, chosen for its exceptional performance under extreme conditions. To ensure they last, Manley has equipped them with chrome stems and hard tips, which significantly boost wear resistance and longevity. You'll also find that the under-head areas are swirl polished, and the combustion faces are fully machined. This design work helps improve airflow into the cylinder and contributes to more efficient combustion, which can make a notable difference in your engine's performance.

This kit is designed for specialized applications where durability and heat resistance are paramount. When you're pushing your engine hard, having components that can withstand the pressure is key. These valves are a testament to Manley's focus on building parts that perform when it matters most.