The StingRay Classic 2 Senior Hydrofoil is engineered to blast all boat types 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 Classic 2 Senior Hydrofoil helps pull them up quicker and increases driver visibility by getting the bow of the boat down sooner. The drag-reducing wing texture ensures maximum top-end speed, while the ghosted graphics package provides a subtle yet powerful statement that your boat features the latest technology from the world's leading hydrofoil stabilizer brand â StingRay Hydrofoils. The 4-bolt installation method is the industry's most secure yet simple installation, giving you confidence and peace of mind while on the water â guaranteed to never come off your engine. The StingRay Classic 2 Senior Hydrofoil provides top-notch performance enhancement, ghosted graphics 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• Drag-reducing wing texture and ghosted graphics• 4-bolt installation• Recommended for all types of boats Reduces or eliminates porpoising, chine walk, cavitation, and ventilation Pulls tubers and skiers up quicker and increases driver visibility Secure yet simple 4-bolt installation | Classic 2 Senior Hydrofoil, 40-300 hp O/Bs and Sterndrives in Black