Manley 11272-1 Gen II Race Flo LS Intake Valve 2.125in Head 5/16in Stem Single

The Manley 11272-1 is a Gen II Race Flo (R/F) intake valve designed for GM LS-platform engines. Featuring a 2.125-inch head diameter and a 5/16-inch (0.3125") stem diameter, this valve is engineered for performance builders seeking improved airflow and durability over stock. Sold individually.

Key Features:

• 2.125" Head Diameter — optimized for high-flow LS cylinder head applications
• 0.3125" (5/16") Stem Diameter — necked-down stem design reduces reciprocating weight and improves airflow
• NK-842 Stainless Steel Construction — premium intake valve alloy offering superior strength and heat resistance
• Chrome-plated stem — enhances wear resistance and reduces friction against valve guides
• Hardened valve tip — withstands high-cycle rocker arm contact without premature wear
• Swirl-polished underhead area — promotes smooth, turbulence-free intake charge flow
• Fully machined combustion face — ensures precise seating and consistent sealing
• Targeted for bracket racing, drag racing, oval track, and high-performance street use at engine speeds below 8,000 RPM
• Sold individually (1 valve per package)

Manley's Race Flo series strikes the ideal balance between performance and value, making it the go-to choice for serious engine builders who demand race-proven quality. The Gen II profile is engineered to deliver significant airflow improvements in LS-based cylinder heads. Always verify guide clearances and use appropriate Manley valve locks (P/N 13098-16 for 7° or P/N 13153-16 for 10°) when installing.