Riva's Yamaha SuperJet Power Filter Kit is designed to increase airflow to your carburetors allowing your engine to produce more horsepower. Kit fits original 38mm Mikuni carburetors. Features all-new 'cone-style' flame arrestors with stainless steel cap and integrated velocity cone that increases air flow rate and efficiency providing improved throttle response. Proprietary stainless steel mesh filter element resists corrosion and is certified to meet U.S. Coast Guard 'SAE-J1928' standars for safety and reliability. Kit also includes anodized billet aluminum carb adapters, stainless steel hardware & water-repellent pre-filter covers. Fits all 2-stroke SuperJet and WaveBlaster 701 models with stock 38mm Mikuni carburetors.