The StingRay XR4 Hydrofoil is engineered to blast boats out of the hole quicker than ever before and keep boats on plane at lower speeds â leading to significant fuel savings. Porpoising, chine walking, 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 Hydrofoil helps pull them up quicker 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 Hydrofoil. The downturned wings also pack water tightly around the prop, making this an ideal solution for boats experiencing cavitation problems â 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 â guaranteed to never come off your engine. Engineered with the very latest in hydrofoil technology, the StingRay XR4 Hydrofoil provides top-notch performance enhancement, next-gen styling, and pays for itself in fuel savings â making this one of the best performance accessories you can add to your boat.• Fits most outboards and sterndrives 40-300 HP• Gets boats on plane quicker• Keeps boats on plane at lower speeds saving significant fuel• Reduces / eliminates cavitation, chine walking, and porpoising• Saves fuel, quickly paying for itself• Increases driver visibility• May increase top-end speed• Next-gen graphics won't scratch, fade, or wear off• 2-bolt installationRecommended for Pontoons, Tritoons, Runabouts, Center-Console Boats, High-Performance Boats with Large Engines, Boats Needing Maximum Lift, Boats Towing Skiers/Tubers/Wakeboarders, or Boats Experiencing Cavitation Issues. Reduces or eliminates porpoising, chine walk, cavitation, and ventilation Downturned wings pack water tightly around the prop to combat cavitation Secure and easy 2-bolt installation | XR4 Hydrofoil, 40-300 hp O/Bs and Sterndrives in Black