This rule change was chosen to ensure the battle for the Red Bull Air Race World Championship was fair, as well as exciting. It's also a lot safer.
The engine chosen for all raceplanes was the six-cylinder, Lycoming Thunderbolt AEIO-540-EXP. This engine produces 300hp at 2,950rpm. The powerplant for each team has been race-tuned and customised to Red Bull Air Race's exact specifications, and built in Lycoming's Advanced Technology Centre.