Solas KG-CD-13/19 Concord Jet Ski impeller has unique blade design that delivers remarkable thrust take off, improves acceleration and top speed. Solas KG-CD-13/19 Jetski impeller is great for pulling skiers as well as racing. ​This upgrade over stock Fits Kawasaki Jet Ski STX 12F 2003-2007 59255-3711