The Jet Ski® Ultra® 310LX is the most powerful personal watercraft in the world. Period. It’s also one of the most advanced, with a Deep-V hull that provides class-leading performance in rough water for racing-like agility and the exclusive JETSOUND® audio system. Power Features 310 Marine Grade Supercharged Engine Digital Fuel Injection-fed 1,498cc inline four-cylinder engine is the reigning king of horsepower, and its crown is the high-tech Eaton Twin Vortices Series® Supercharger The Eaton TVS Supercharger is designed to deliver large quantities of boost at all RPMs from idle to redline. Working in conjunction with an intercooler, it supplies the engine with an uninterrupted flow of cool, dense air for maximum performance Advanced Design JETSOUND® audio system, a first in personal watercraft GPS mount conveniently integrated into handlebar pad Deep-V hull offers class-leading performance in rough water Tuned sponsons enhance performance and maneuverability Comfort 3-passenger seat with industry-first heat-resistant seat cover fabric Industry-leading storage 5-position adjustable handlebar Power Engine: Supercharged and intercooled, 4-stroke, DOHC, four valves per cylinder, inline 4-cylinder Displacement: 1,498cc Bore x Stroke: 83.0 x 69.2mm Compression ratio: 8.2:1 Induction: Eaton Twin Vortices Series Roots-type supercharger with air-to-water intercooler Maximum Boost: 16.8 psi Cooling System: Inducted water Fuel System: DFI® with 60mm throttle body Ignition: TCBI with digital advance Starting System: Electric Propulsion System: 160mm jet pump, axial-flow, single stage Impeller: 3-blade, oval-edge stainless steel Thrust: 1890 lb.