Manley 11712H-8 Severe Duty 2.080" +.100" Hollow Stem Exhaust Valve

The Manley 11712H-8 is a Severe Duty hollow-stem exhaust valve featuring a 2.080-inch head diameter with a +0.100-inch oversized stem. Designed for high-performance and racing applications, this valve is built to withstand extreme heat and stress conditions that standard OEM valves cannot handle.

Manley's Severe Duty valves are manufactured from premium one-piece forged stainless steel, providing superior strength and corrosion resistance. The hollow stem construction reduces reciprocating valve train weight, improving high-RPM response and reducing wear on valve train components. This design also aids in heat dissipation, transferring heat away from the valve head more efficiently than solid-stem alternatives.

Key Features:

• Head Diameter: 2.080 inches
• Stem Size: +0.100 inch oversize
• Hollow stem design for reduced weight and improved heat transfer
• One-piece forged stainless steel construction
• Severe Duty rating for high-performance and racing use
• Designed to work with standard Manley valve springs and retainers

The Manley 11712H-8 is an ideal upgrade for engines operating under sustained high-RPM, forced induction, or high-compression conditions where exhaust valve durability and thermal management are critical. The +0.100 oversize stem accommodates worn or reamed valve guides, making this an excellent choice for engine rebuilds requiring guide restoration.