The HyperFoil 500 from StringRay overcomes limitations of the traditional hydrofoil, unleashing the top-end potential of your bass boat. Proprietary HyperSpeed Red material reduces drag, opening up maximum top-end speed with flawless hole shots. A must-own upgrade for any serious bass boater, it eliminates porpoising, cavitation, ventilation and chine walking. Increased visibility for your engines lower unit in water and during transport prevents costly collisions. StingRays patented No-Drill Technology requires zero holes in the engine during installation on engines 40hp and above. Fits most outboards and sterndrives from 4 to 300hp. Does not fit Evinrude ETEC or Volvo Penta (with exhaust through cavitation plate). Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Hydrofoil.