Solas st-cd-15/20 Concord SeaDoo impeller has unique blade design that delivers remarkable thrust take off, improves acceleration and top speed 2+mph. Solas st-cd-15/20 Sea Doo impeller is great for pulling skiers to race. This upgrade over stock Impeller Fits Sea Doo impeller XP Ltd. 98-99, XP DI 00-04, XP 00-04, GSX Ltd. 98-99, RX DI 00-03, RX 00-03, GTX ltd 98-99, GTX 00-03 GTX DI 00-03