An elliptic curve velocity stack is proven to outflow all other designs. Velocity stack design flows 8% more air than no filter at all! Moulded specifically for the Kawasaki Throttle body and is perfectly matched to the ID. Urethane and non-magnetic 316 stainless steel screen construction. Custom engineered and moulded specifically for the Kawasaki SXR 1500 Jet-Ski
No paper or synthetic element to get wet and restrict air flow
Also recommended is the Crankcase Breather when removing the stock air box.