Boat Propeller 'Fins' - Hydrofoils & Troll Plates

Uncle Norm’s Fin Products are built to give both recreational and professional boaters enhanced steering and maneuverability at all speeds and in any water conditions. Each fin increases your motor’s effective rudder area by at least three times, delivering exceptional control, sharper turns, and improved tracking—even in wind or choppy water. You’ll notice smoother handling, better engine efficiency, and reduced cycling in Autopilot systems. On Outboard and I/O motors, the fins also reduce cavitation for stronger thrust and overall performance. Installation is quick and easy with basic hand tools—no drilling or engine modification required when using our No-Drill Clamp Set (sold separately).