Skat-Trak’s Kawasaki impeller is recommended with a 14/24 1100/1200 Swirl* or 14/24R Swirl** pitch in an 148mm pump. This is recommended for a stock Engine only. If you have modification to the engine and watercraft, please give us a call so that we can recommend you with the correct impeller application. *Suggested for maximum bottom-to-mid range acceleration gains.**Sugested for maximum top speed gains.