COMP Cams Sportsman Valves are available in a variety of materials, diameters and stem lengths for street and competition engines. The stainless steel valves are made from 21-4N forged steel alloy with 50 HRC minimum hard tips (eliminating lash caps); these valves deliver tremendous performance and durability. The hard chrome-plated 11/32" stems utilize proprietary oil retention surfacing. For extremely high revving LS applications, COMP® engineers developed titanium valves. Weighing 35% less than stainless steel, titanium valves are a must for race applications where valve float is not an option. For high temperature and high boost applications, valves constructed from Inconel superalloy are also available. PartNumber : cca6039-1 Description : Sportsman Stainless Steel Street Intake Valves; Single Piece Title : 6039-1 SS Valve, LS1 INT 2.02" 4.900" W/.170"Tip Material : Stainless Steel Number of Grooves : Single Overall Length : 4.9 Valve Position : Intake Valve Series : Sportsman Valve Stem Outer Diameter : 8 California Proposition 65 : WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov Engine Family : GM Gen III LS1/LS2/LS6 Head Diameter : 2.02 Size : 8mm Lock Groove : Single Overall Length : 4.900" Head Diameter : 2.020" Engine Components::Valves