Manley Performance Race Master Stainless Steel Valves with Chrome Stems and H...

Manley Performance Race Master Stainless Steel Valves High-performance stainless steel valves engineered for racing engines that demand durability, precise sealing and optimized airflow. Ideal for builders and racers using alcohol fuels. Key Features Premium Stainless Steel Construction — Both intake (NK-842) and exhaust (XH-426) valves are made from high-quality stainless steel for superior strength and corrosion resistance. Chrome Stems & Hardened Tips — Chrome-plated stems reduce wear and scuffing; hardened tips extend service life under extreme valvetrain stress. Swirl Polished Under-Head — Polished areas beneath the head improve gas flow and reduce turbulence for better cylinder filling. Fully Machined Combustion Faces — Precision-machined faces ensure consistent sealing, heat transfer and combustion efficiency. Multiple Shapes Available — Choose Race Master (straight stem) or Race Flo profiles to match porting and flow goals for your application. Recommended for Alcohol Engines — Particularly well-suited as exhaust valves in alcohol-fueled powerplants, offering reliable performance in demanding conditions. Why Choose Manley Race Master Valves? These valves combine metallurgical quality and race-focused machining to deliver durability, consistent sealing and optimized flow. Whether building a competition motor or upgrading a high-output engine, Manley Race Master valves provide the reliability and performance racers require.