Manley Chevy LS-3 / L-99 (L-92 Head) 2.165in Head Diameter Pro Flo Intake Valves (Set of 8)

This set includes eight Manley Pro Flo intake valves, each with a 2.165-inch head diameter, designed for Chevy LS-3 and L-99 engines, specifically those using the L-92 cylinder head. These valves are built with NK-844 material, which Manley states offers significantly higher tensile strength at high temperatures compared to other intake valve materials. The swirl-polished under-head areas and fully machined faces are intended to help improve airflow into the combustion chamber, contributing to better engine efficiency.

Manley's Severe Duty valves are put through rigorous fatigue testing. The manufacturer reports that these valves have endured up to 100 million cycles in tests where competitors' valves failed much sooner. They feature chrome stems and hard tips, which add to their durability and help them withstand the demanding conditions within a high-temperature gasoline engine. The stem diameter is 0.3133 inches and the overall length is 5.200 inches.