The standard of the industry since their inception, Manley valves are designed to outflow and outperform all others even in the most severe environments. Manufactured from high temperature materials, these valves feature swirl polished, performance oriented shapes and durable chrome plated or nitride finished stems. EXTREME DUTY SERIES Ultra high temperature alloys specifically designed for exhaust valves. The same alloy we use to produce exhaust valves for 6,000 + horsepower Top Fuel Dragsters and Funny Cars and of course Marine Engines.

Manley stainless steel valves feature: • Forged construction • Swirl polished underhead • Fully machined combustion face • Hard tips • Compatible with unleaded fuels • Durable chrome plated stems