Jet Worx Ultra 250 Pulley kit. This kit is an easy, bolt on performance upgrade. The kit includes injectors, fuel pump, timing rotor, pulley and associated hardware. All you have to do is install the kit, pull the throttle that gets a smile on your face. All testing was done with Solas Concord impeller, Jet Worx ride plate, pump wedge and Jet Worx air intake. The upgraded watercraft reaches 74,5-75,5mph at 8,300rpm. The kit costs $1800 and it comes from Australia.