Single Exhaust Valve\n\nCompatible with: GM 2.3L 138 (Enginetech V2265)\nNominal Stem Diameter: 7.00 mm\nET Stem Diameter: 0.2744 inches\nStandard Head Diameter: 1.240 inches\nET Head Diameter: 1.240 inches\nValve Length: 4.311 inches\nNumber of Grooves:...