Impeller Constructed of ultra high-strength, corrosion-resistant stainless steel Exclusive hub-end water seal keeps the nasty stuff out of precious parts Mirror-smooth finish and polished hub resists cavitation Impeller pitch is determined by casting, not bending CONCORD: THE POWER TORQUE SERIES Variable pitch offers both low-speed torque and all-out high speed in one impeller This unique impeller enhances all-range maneuverability with no slippage in water hookup X-PROP: HIGH SPEED AND ULTIMATE PERFORMANCE X-prop series impellers produce the most powerful propulsion in the water from an advanced design that incorporates a high-compression hub and cambered blades DYNAFLY: MAXIMUM ACCELERATION Lower pitch angle is recommended for stock motors; higher pitch angle is recommended for modified motors; lower pitch angle can also be used with modified motors if improved acceleration is desired Improve acceleration and top end while eliminating performance holes Blade geometry designed specifically for high compression ratio jet-pump systems TWIN: STATE-OF-THE-ART DESIGN Specially for Yamaha SHO, SHO FRZ and FZS models, the twin series features the latest advances in high-performance impeller design SUPER CAMBER Race, tow waterskiers and carry multiple passengers with ease The blade has a variable pitch, designed to give both strong low-end thrust and unmatched top-end performance A- and B-series offer a cost-effective solution and features both low-speed torque and all-out high speed in one impeller I-, J-, K- and S-series feature a proven impeller design with increased blade surface and smaller hub for more power and volumetric flow, making them the best all-around impellers on the market Grunt and speed from one impeller