The K&N Drop in Air Filters E-2998 are high-performance air filters designed to replace the factory air filter in a vehicle's air intake system. These filters are made with multiple layers of oiled cotton gauze, which allows for increased air flow and improved filtration compared to traditional paper filters. The filters are designed to be a direct fit and require no modifications for installation. They are washable and reusable, making them a more environmentally friendly and cost-effective option compared to disposable filters. The K&N Drop in Air Filters E-2998 are compatible with a wide range of vehicle makes and models.