Ferrea 6000 series Intake Valve, 1.940 inch Head, 11/32 in Valve Stem, 5.010 in + .100 Long, Stainless Steel, Applications Small Block Chevy flat tappet, hydraulic and solid roller cam shafts, Set of 8. The 6000 Series Competition Valves are designed to provide excellent reliability in an environment of high spring pressures and roller cams, at a budget price. They have higher fatigue resistance and tensile strengths than our competitor’s best offerings. These valves can be used in Drag and Oval Track racing applications. Please e-mail questions.