The purpose of these fins is to ram more water into the intake and to shield the forward sides of the intake from the entrance of air.
     There is a noticeable reduction of engine overspeeding when running with the wind on a heavy chop.
     To a lesser degreee, the fins provide some rudder effect when operating at low speeds.
     This is not a cure all for caviation and it is still necessary to set the engine height and angle properly and to minimize obstructions in the hull ahead of the intake.
 
SELECT YOUR INTAKE SIZE IN DROP DOWN MENU
 
Fins fit standard factory aluminum intakes