The engine, as used in the XJ-6 airspeeder as a dual set.
This engine was a type of engine used in seventh-stage bank-courier repulsor-trucks, which were common on the world of Aargau. The XJ-6 utilized this type of engine, which, due to its use in larger cargo-carrying airspeeders, could produce a great deal more speed and power in a smaller, sportier type of craft.
Sources
- Star Wars: Attack of the Clones Incredible Cross-Sections (First mentioned)
- The Official Star Wars Fact File 29 SPE 1-2: Anakin's Airspeeder
airspeeder, Anakin Skywalker's in the Databank (original site is defunct)