Maintain lower planning speeds Increases fuel efficiency and reduce bow rise Promotes fast out-of-the-hole times Designed by an aeronautical engineer, Doel Fin is a true hydrofoil Simple 15-minute installation, hardware included Doel-Fin fits all newer outboard and stern drive motors from 5 horsepower, except Volvo Penta outdrives Doel-Fin improves overall performance - even on boats with well designed hulls Save up to 30% on fuel consumption Faster out-of-the-hole for happier water skiers and wake boarders. Increase performance and safety; Sport type: Boating