For early style 2 Piece Articulated Pistons that use the 4089154 ring sets. Includes Liners with Seals, Ring Sets, Retainers, Rod Bearing(for drilled rods), Main Bearings, Bypass Plunger Valve, Head Gasket Set, Pan Gasket and P/U Tube O-ring. Does NOT include Piston Crowns, Skirts, or Piston Pins