Solas SK-CD-12/17 This performance upgrade over stock and is balanced and trued for aggresive performance. Our Factory Racers use this. Impeller Fits  Sea Doo Spark, ACE 900 and ACE 900 HO. Stock to limited mods. The Solas SK-CD-12/17 Seadoo impeller will give better performance all around and 2+mph.