The Superior Air Parts XP-382 is an aircraft engine, designed and produced by Superior Air Parts of Coppell, Texas, United States for use in homebuilt aircraft.
The engine is a four-cylinder four-stroke, horizontally-opposed, 382 cu in (6,260 cc) displacement, fuel injected air-cooled, direct-drive, gasoline engine design.
[2] The engine is not type certified and is therefore intended for homebuilt aircraft.
The company made this decision based on detonation problems found in some XP-400 engines that could not be resolved.
Due to parts commonality, the decision was made to buy-back the XP-382 engines as well.