The Stingray Stealth is the world's first and only dual angle hydrofoil. This allows boaters to experience optimal performance at all throttle ranges. At lower speeds the hydrofoil utilizes the inner angle, while at higher throttle ranges, the Stealth 2 uses its wing tips to maintain consistent, impressive performance. Plus, a fast-finish lowers hydrodynamic drag dramatically. Hidden, no-drill attachment for quick installation. Great for boaters who want to plane in half the time, reduce bow rise, stop cavitation, and increase fuel efficiency.