Titanium Valves for Weight Reduction: Ideal for reducing valve train weight, improving engine efficiency, and enhancing overall performance.High-RPM Capabilities: Tailored for high-rpm and extended high-rpm applications, allowing for higher engine speeds and compatibility with aggressive camshaft profiles.One-Piece Forged Construction: Manley titanium valves feature one-piece forged construction with grain flow, ensuring durability and minimizing potential weak points compared to head-welded alternatives.State-of-the-Art Machining: Meticulously machined in state-of-the-art CNC turning centers and valve stem grinders, maintaining exacting tolerances for optimal valve performance.Exceptional Titanium Alloys for Durability: Manley utilizes the finest titanium alloys for both intake and exhaust valves, striking a perfect balance between mechanical properties, hardness, ductility, and fatigue strength at specific temperatures.Rigorous Quality Control for Reliability: Each Manley titanium valve undergoes a stringent final inspection process to ensure uncompromising quality, performance, and reliability.Tight Tolerance Delivery: Strict quality control measures enable the delivery of valves within tight tolerances, meeting the highest precision standards.These valves have an inserted hard tip and an O.E. style single radius keeper groove.* Use Manley valve lock P/N 13098-16 (7 degree) or 13153-16 (10 degree) depending on your spring/retainer choice.