Manley 12354H-1 Severe Duty Pro Flo Hollow Stem Intake Valve 2.165" LS3 L92

The Manley 12354H-1 is a high-performance Severe Duty Pro Flo hollow stem intake valve designed for LS3, L99, and L92 cylinder head applications. This premium stainless steel valve features a 2.165-inch head diameter and .3133-inch stem diameter, with a .300-inch longer installed height for enhanced performance in bracket racing, oval track, and high-performance street engines.

Key Features:

• Hollow stem design reduces weight while maintaining strength for faster valve response and improved efficiency
• Pro Flo undercut design delivers optimized airflow for maximum engine performance
• Constructed from NK-844 stainless steel intake material for superior durability
• Hard-coated chrome stem with .0002-inch thick chrome plating for reduced friction and wear
• Hardened valve tip provides excellent wear resistance with rocker arm contact
• Swirl-polished head and fully machined for precision fitment
• O.E. style radius keeper grooves for reliable valve lock retention

Manley Performance has been a globally recognized leader in performance engine components since 1966, trusted by professional engine builders and racers worldwide. Each valve is manufactured to exacting standards in their Lakewood, New Jersey facility and individually inspected to ensure the quality that has made Manley the choice of OEM manufacturers including Ford Performance.

Specifications:

• Valve Head Diameter: 2.165 inches
• Stem Diameter: .3133 inches
• Installed Height: +.300 inches (longer than stock)
• Overall Length: 5.200 inches
• Material: NK-844 Stainless Steel
• Application: LS3, L99, L92 Cylinder Heads

This valve is sold individually and is ideal for engine builders looking to upgrade individual valves or replace damaged components.