The aFe P5R Drop In Air Filter 31-10090 is a high-performance air filter designed to fit into your vehicle's existing air box. It is made with 5 layers of oiled cotton gauze media, providing superior filtration and airflow compared to stock paper filters. The filter is washable and reusable, making it a cost-effective and environmentally friendly option. It is a direct replacement for the factory air filter, requiring no modifications for installation. This product is designed to improve engine performance and fuel efficiency, while also protecting your engine from harmful contaminants.