Smithsonian® Motor-Works™ Advanced Science Kit.Includes: 2 Washers, 2 Shafts in Various Lengths, 4 Exhaust Valves, 4 Intake Valves, 8 Valve Stems, 4 Piston Pins, 8 Piston Halves, 4 Connecting Rod Keepers, 4 Connecting Rods, 8 Timing Cams, 8 Rocker Arms, 1 Crankshaft, 1 Crankshaft Pulley, 1 Fan Pulley, 1 Fan, 1 Engine Mounting Stand, 5 Bearings, 1 Clutch Housing, 1 Oil-Pan, 1 Lower Crankcase, 1 Rocker Arm Cover, 1 Upper Cylinder Head, 1 Timing Belt, 1 Timing Wheel, 1 Timing Gear, 1 Belt Tensioning Pulley, 1 Lower Cylinder Head, 1 Cylinder Block, 1 Dipstick, 1 Positioning Jig, 1 Timing Belt Cover, 1 Intake Manifold, 1 Exhaust Manifold, 1 Carburetor Cover, 1 Carburetor Bowl, 1 Front Half of Water Pump, 1 Rear Half of Water Pump, 1 Flywheel Clutch, 1 Fan Belt, 1 Head Gasket, 8 Valve Springs, 1 Distributor Assembly, 1 Drive Module, 1 Battery Pack, 67 Screws and Color Poster with Instructions.