ProWatercraft Yamaha 4 Stroke Superjet 2021+ Mid Sponson Kit.
The Prowatercraft Mid Sponson kit improves the riders confidence when riding their stand up watercraft. Our mid sponsons provide more turning grip, better stability in a straight line, and when leaning over in a turn. The difference between us and the competition is tight, pivoting / cornering grip and high-speed turning of the ski . These traits make the ride smoother through
every turn. The HFC sponson bolts to the inside of the bond flange with a threaded backing plate along with all the hardware needed.