The original manufacturers box was open to check the contents, which are all in perfectly new condition. Detroit 60 Series Head Gasket Set. 1 – 131494 (Detroit 3899343) Oil Return Gasket. 1 – EGS-3890-020 (Detroit 8929529) Turbo Mounting Gasket. 3 – 631294 (Detroit 23517875) Intake Manifold Gasket. 1 – 631288 (Detroit 23521894) Camshaft Plate Gasket. 1 – 631300 (Detroit 23528491) Cam Thrust Plate Seal. 1 – 631301 (Detroit 23521935) Camshaft Plate Gasket. 1 – 631302 (Detroit 23522975) Cap Seal. 2 – 621267 (Detroit 8929740) Rectangular Sealing Ring. 2 – EOS-3305 (Detroit 5132155) Thermostat Seal. 1 – 631295 (Detroit 8929130) Accessory Drive Gasket. 1 – 631266 (Detroit 23538406) Cylinder Head Gasket. 3 – 631293 (Detroit 23533983) Exhaust Manifold Gasket. 6 – 621223 (Detroit 5104701) Tube O-Ring. 1 – 621224 Injector O-Ring Kit. 1 – 136102 (Detroit 3963990) Fuel Fitting Seal.