Manley Stainless Steel Intake Valve Head Diameter

Manley stainless steel intake valves are built for engine builders who need dependable airflow and durability. They suit performance street, racing, and other high-load applications. Each valve is a precision-made, high-performance replacement for the stock intake valve. Valves in this line are available in a range of head diameters, stem diameters, and lengths to match different engine builds.

Key Features:

• Stainless steel construction: Resists heat, wear, and fatigue better than many stock valves in demanding conditions.
• Performance-focused design: Manley's Pro-Flo style undercuts reduce stem diameter at the fillet. This improves airflow and lowers valve weight.
• Swirl-polished finish: Helps air and fuel flow into the combustion chamber and reduces turbulence.
• Precision machining: Machined heads and stems give consistent, balanced quality from valve to valve.
• Hardened stem tips: Many valves in the line have chrome stems and hard tips, which cut wear at the valve tip and in the guide.
• Multiple series: Manley offers its stainless valves in Performance, Severe Duty, Extreme Duty, Race Master, and Race Flo series. These cover applications from spirited street use to supercharged, high-RPM, and alcohol-burning engines.

Manley has been a long-time maker of engine valves and internal components for racing and performance engines. Choose the head diameter, stem diameter, and overall length that match your cylinder head and valvetrain setup.