This weld-in alloy bushing is designed for use on an aluminum boat when hydraulic steering would be obstructed with standard tubes. They are used in conjunction with the Bushing Kit. The Vibra-Stop Bushing Kit is the ultimate in vibration reduction when combined with our backing pads. The Bushing Kit mechanically isolates the engine mounting bolts from the transom by forming a flexible elastomeric mount between the boat and the outboard engine. This results in a much quieter boat. Extensive testing has proven that this kit reduces vibration in boats by up to 50% over the use of our pads alone.