StingRay Stealth Hydrofoil Stabilizer. Get up on plane faster Eliminate chine walking, porpoising and cavitation Enjoy higher speeds and greater fuel efficiency Easy no-drill installation Optimize the performance of your boat and motor at all speeds with a Stealth Hydrofoil. Its dual-angle-of-attack wing design gets your boat up on plane in less time than without a hydrofoil. Enhanced efficiency delivers true stabilization and wipes out cavitation. You'll also find that pulling skiers is much easier and your top speed will increase.