Sealed intake increases airflow for dyno-proven performance and improved throttle response Large sight window to monitor filter condition Massive air filter with Pro 10R oiled cotton media for optimal air flow and efficiency Product covered by one or more of the following patents: 11745129, 9440175, 11376536, 11219850, 11331607, 11135538, 10252202, 10532304 This item is 50-State legal: CARB EO# D-550-18