Bore/Stroke: 4.02x4.72 inches. Direct injected with rotary mechanical injection pump. Turbocharged/ Aftercooled. OHV valvetrain with 2 valves per cylinder. Horsepower: 105 HP@2300 rpm Torque: 265 lb-ft @1600rpm (output may very with application). No starter, bell house, flywheel. Test ran 10-29-16: "Good Running A+" with 55-70 psi oil pressure. Sweet runner with no smoke at all. See it run on video.