Delivers a significant handling improvement over the stock sponsons with superior blade design and backing plate. Includes a bulletproof mounting system that features three anchor points with billet inserts in sponson fins. Backing plate is precision machined from high strength billet aluminum that is anodized to prevent corrosion. Sponson depth and forward/aft position are adjustable to control the amount of influence they have on the craft. Easy installation requires no drilling. Fits all Kawasaki Ultra 310/300/260/250/LX models.