COMP Cams Titanium Valves LS7 Exh 1.615COMP Cams Sportsman Valves are available in a variety of diameters, stem sizes and lengths for street and Competition engines. For high revving LS Applications, RHS engineers developed titanium valves. Weighing 35 percent less than stainless Steel, titanium valves are a must for Race Applications where valve float is not an option. For RHS LS7 Cylinder Heads or other suitable heads. Catalog User 1