Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.454in O/A Length, 0.3715in Stem

Manley Performance Products offers these Extreme Duty Series exhaust valves, specifically crafted for demanding applications like Top Fuel and Funny Car drag racing, as well as high-performance Big Block Chevy marine engines. If your engine faces extreme forces and intense heat, these valves are built to handle it.

The core of these valves is Manley's XH-432 XtremeAlloy material, chosen for its exceptional heat and force resistance. They feature chrome stems and hard tips, which significantly boosts their longevity and wear resistance under harsh operating conditions. The under-head areas are swirl polished to help improve airflow, and the fully machined combustion faces further optimize combustion efficiency, making them a solid choice for engines pushed to their limits.

This kit includes eight exhaust valves, each measuring 1.900 inches in head diameter and 5.454 inches overall length, with a 0.3715-inch stem diameter. They are designed as a direct replacement for many Big Block Chevy applications where superior exhaust valve performance is critical.