The StingRay XR4, Senior Hydrofoil is designed to provide maximum lift, blast boats out of the hole quicker than ever before, and keep boats on plane at lower speeds - leading to significant fuel savings! Porpoising, chinewalking, cavitation, and ventilation are reduced or eliminated - stabilizing the boat and providing a safer and more comfortable ride. For boats pulling tubers, skiers, or wakeboarders the StingRay XR4, Senior Hydrofoil helps pull them up quicker, smooths out the wake for more enjoyable towing, and increases driver visibility by getting the bow of the boat down sooner. Heavy runabouts and ocean-going center-consoles can benefit from the maximum lift provided by the StingRay XR4, Senior Hydrofoil. The downturned wings also pack water tightly around the prop, making this an ideal solution for boats experiencing cavitation problems - a common issue found on pontoon and tritoon boats. The next-gen graphics package provides the most advanced graphics in the industry while complementing the styling found on new outboard engines. The 2-Bolt Installation method is the industry's most secure and easiest installation giving you confidence and peace of mind while on the water - guaranteed to never come off your engine! Engineered with the very latest in hydrofoil technology, the StingRay XR4, Senior Hydrofoil provides top-notch performance enhancement, next-gen styling, and pays for itself in fuel savings - making this one of the best performance accessories you can add to your boat! Fits Most Outboards and Sterndrives: 40-300HPSaves Fuel - Quickly Pays for ItselfIncreases Driver VisibilityMay Increase Top-End SpeedNext-Gen Graphics - won't Scratch, Fade, or Wear OffFeatures 2-Bolt InstallationRecommended For: Pontoons, Tritoons, Runabouts, Center-Console Boats, High-Performance Boats w/ Large Engines, Boats Needing Maximum Lift, Boats Towing Skiers/Tubers/Wakeboarders, or Boats Experiencing Cavitation Issues