Manley Big Block Chevrolet Extreme Duty Exh. Valve 1.88in. Head Dia / .3415in. Stem Dia - Set of 8

Manley's XH-432 XtremeAlloy is a tough material designed to handle the intense heat and stress found in high-performance Big Block Chevrolet engines. These exhaust valves are specifically made for applications that push the limits, like Top Fuel and Funny Car drag racing, or powerful marine engines. If your Big Block Chevy is built for extreme duty, these valves are a solid choice to keep things running strong under pressure.

Beyond the advanced alloy, Manley has added features to make these valves last and perform. They come with chrome stems and hard tips, which are important for resisting wear and tear over time, especially in engines that see a lot of hard use. The under-head areas are swirl polished to help smooth out airflow, and the combustion faces are fully machined. This attention to detail helps improve how efficiently your engine breathes and burns fuel, which can make a noticeable difference in performance when you're really asking a lot from your engine.

This set includes eight valves, enough for a complete set of exhaust valves for a V8 engine. When you're building an engine that needs to withstand extreme conditions, using parts like these Manley Extreme Duty valves is key to achieving reliability and performance.