Davis® Doel Fin Outboard Stabilizer.
Developed by an aeronautical engineer! Will improve overall performance on all boats with outboard motors or outdrive units. Molded in 2-Pcs. of guaranteed unbreakable, high-strength plastic, each foil is designed to flex independently to absorb shock.
The positive effects include greater stability, consistent planing at lower RPM, faster out-of-the-hole performance. Also, better gas mileage, steadier turns, higher top-end speeds and lower bow rise at all speeds. Doel-Fin is designed for use with small motors, big motors and inflatable dingies.