LYCOMING INVERTED OIL SYSTEM • AVAILABLE FOR SALE • Lycoming Inverted Oil, New Oil Valve Assembly in the box P/N LW-57B19829, New Tee P/N LW-13755, purchased new for Lycoming 540 Engine and never used, may also work for other 6 and 4 cylinder engines, $425.00 for the items in listing photos. Start your inverted kit here and save.. Lycoming O-360: The Lycoming O-540 is a family of air-cooled six-cylinder, horizontally opposed fixed-wing aircraft and helicopter Lycoming Engines. The engine is a six-cylinder version of the four-cylinder Lycoming O-360 Design and development. Producing between 230 and 350 horsepower (170 and 260 kW. "/>Lycoming thunderbolt 540 price