Sealed intake increases airflow for dyno-proven performance and improved throttle response Large sight window for easy viewing Massive air filter with Pro 5R oiled cotton media for maximum air flow 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-550-22 5-layer progressive cotton gauze media Huge 5 inch flange with inverted top air filter Dyno tuned intake tube Unique housing to filter interface (patent pending) Made and assembled in the USA