Manley 11234H-8 Super Duty Hollow Stem Intake Valves 2.055" +.100 Oversize

The Manley 11234H-8 Super Duty hollow stem intake valves deliver race-proven performance for high-output and competition engines. Featuring a 2.055-inch head diameter with a +0.100-inch oversize stem, these valves are designed as direct drop-in replacements for oversized valve guide applications, restoring proper clearances in worn or reamed cylinder heads.

Manley's hollow stem construction reduces reciprocating mass without sacrificing strength, allowing the valvetrain to rev more freely and respond faster — critical in high-RPM racing and performance builds. The Super Duty (S/D) series is manufactured from high-strength stainless steel alloy and features precision-ground stem diameters for consistent fitment and sealing.

Key Features:

• Head Diameter: 2.055 inches
• Stem Size: +0.100 inch oversize for use with reamed or oversized guides
• Hollow stem design reduces valve weight and reciprocating mass
• Super Duty (S/D) series — engineered for high-performance and racing applications
• Manufactured from premium stainless steel alloy for heat and corrosion resistance
• Precision-ground stem for accurate fitment and consistent sealing

Manley Performance has been a trusted name in professional racing and high-performance engine building for decades. The 11234H-8 intake valve set is ideal for engine builders looking to restore or upgrade valve train components in performance street, drag race, or circle track applications.