Manufactured with a no-drill installation option, it gives you the choice to select the method that suits you best without causing damage to the engine. The "D" shape profile and longer edges provide increased stability, while the inverted rear edge reduces drag. Made for engines over 40hp. Ideal for those who want their boat to plane in half the time, reduce bow lift, eliminate chine walking, and stop cavitation. At the same time, it allows for maximum speed and increased fuel efficiency.