The Arlen Ness Sidekick Air Cleaner is the ultimate performance air cleaner that helps you get the most power and acceleration out of your bike. Its angled design provides excellent legroom and increased airflow, plus superior style, so you can enjoy a comfortable and powerful ride. This air filter features a high-flow black synthetic filter element wrapped in a stainless steel mesh for maximum efficiency. Plus, it includes a clear polycarbonate window that not only looks cool but also gives you visual insight into your intake system as it works its magic. Get ready to experience a whole new level of performance with the Arlen Ness Sidekick Air Cleaner!