Add to Cart The item has been added Davis Doel-Fin Hydrofoil f/Outboards & Outdrives 440 Doel-Fin Stabilizer Fin - BlackDoel-Fin is the original hydrofoil developed by an aeronautical engineer to improve overall performance on all boats with outboard motors or outdrive units. Molded in... MSRP: $39.99 Add to Cart The item has been added Compare