Single Intake Valve\n\nCompatible with: Pontiac 4.9L 301 (Enginetech V1822)\nNominal Stem Diameter: 11/32 inches\nET Stem Diameter: 0.3419 inches\nStandard Head Diameter: 1.720 inches\nET Head Diameter: 1.720 inches\nValve Length: 5.078 inches\nNumber of...