Sierra 18-1278 Head Gasket SetSierra high-quality engine parts are designed to meet OEM specifications. Minimizes inventory investment to cover most major engine applications; Maximizes inventory utilizations via mix and match system; Utilizes generic type gasket kits common among all engine brands; Set Contains: (2) 18-0311 Valve Cover Gasket; (1) 18-0463 Carburetor Mounting Gasket; (12) 18-0518 Valve Stem Seal; (1) 18-0874 Distributor Gasket; (1) 18-0994 Carburetor Mounting Gasket; (1) 18-1238 Intake Gasket Set; (1) 18-3879 Head Gasket; (6) 18-4024 Intake Valve Stem Seal;