Solas YF-CD-13/19 Concord Yamaha impeller, has unique blade design that delivers remarkable thrust take off, Solas impeller improves acceleration and top speed 2+mph. Solas yf-cd-13/19 is great for pulling skiers to racing. Solas This upgrade over stock impellers Fit Yamaha GP1300R 03-04, GP1200R 00-02 R 60t-r1321-00-00 66v-r1321-00-00 plus 14/20 avail for mod engines by phone.