If you have a need for more speed and want top performance from your bike then this is for you. Designed specifically to maximize airflow into the carburetor or throttle body, the Stinger's two large raised scoops channel air through a high-flow foam filter element. This is an incredibly cost effective way to increase air flow in any standard Hypercharger. Easy four bolt replacement of any standard trap door. Sit down, shut-up, and hang on.8498 Stinger Trap Door with Filter (ea).