OLDS OLDSMOBILE CUTLASS 442 PROFESSIONALLY REBUILT 455 “G” Heads. Valves ground, slightly heavier springs, hot tanked, magnafluxed, Ready to bolt on. Stock rockers, towers, bolts and springs and push rods included. Valve sizes: Intake 2.00. Exhaust 1.625. All “G” heads are factory approved for use with unleaded fuel. In the pictures I have included a chart showing valve sizes and unleaded fuel designation.