Introduced in 1954, the O-480 was a
six-cylinder version of the four-cylinder O-320. This engine remained in
production until 1978.
- GO-480-B: 270 hp (201 kW)
- GSO-480-A1A6: 340 hp (253 kW)
- Horizontally opposed, 6 cylinder, piston engine
- Displacement: 480 cubic inches (7.9 litres)
- Bore x stroke: 5.125 x 3.875 inches