St-Just Aviation

St-Just Aviation is a Canadian aircraft manufacturer based in Boucherville, Quebec, a suburb of Montreal. The company specializes in the design and manufacture of aircraft kits for bushplane operations, based on Cessna designs. The company was originally located in Mirabel.

By 2023 the company had ceased business and the Super Cyclone kit production moved to Bushliner Aircraft Manufacturing of Granite Falls, Washington, who were building it under the name Bushliner 1850EX.