Single Exhaust Valve\n\nCompatible with: GM 3.4L 207 DOHC (Enginetech V2683)\nNominal Stem Diameter: 7.00 mm\nET Stem Diameter: 0.2739 inches\nStandard Head Diameter: 1.260 inches\nET Head Diameter: 1.260 inches\nValve Length: 4.100 inches\nNumber of...