The reusable K&N high-flow air filters feature state-of-the-art varnished membrane design with a multi-layer membrane designed to improve air flow and collect pollutants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, built to last the lifetime of your vehicle, and is backed by K&N's 10-year/million-mile warranty. K&N drop-in replacement filters are designed to easily install into your factory air box.