Interior shapes, especially the critical radius leading into the carb or throttle body, have been carefully designed. Outer cover incorporates an additional scoop to direct air into a high-flow, washable foam filter element that seats snuggly in the end of round K&N filter elements. Frontal opening is huge and as with all Hyperchargers, the vacuum operated butterflies allow almost unrestricted airflow to the filter under high-load riding situations. Kit contains an all-chrome Pro-R Hypercharger, mounting kit and carburetor jetting necessary for a complete, sanitary installation. NOTE: For optimum performance and driveability on fuel injected motorcycles, we strongly recommend use of the Wild Things Fuel Injector Controller.