Solas yf-cd-12/18 Concord Yamaha impeller, has unique blade design that delivers remarkable thrust take off, improves acceleration and top speed 2+mph. great for pulling skiers to racing. Solas impeller yf-cd-12/18 ​This upgrade over stock Fits Yamaha 998cc engines: Yamaha Boat SX 230 04-05, SR 230 04-05, AR 230 04-05 Yamaha Waverunner FX Cruiser 03-07, FX-140 02-07, SUV, XLT1200, XL1200Ltd, replaces 68N-R1321-00-00