The BMC Air Filters Air Filter - FB26901 is a high-performance air filter designed for use in automotive engines. It is made from a multi-layered cotton gauze material that provides superior filtration and airflow compared to traditional paper filters. The filter is washable and reusable, making it a more cost-effective and environmentally friendly option. It is designed to fit perfectly into the factory air box and requires no modifications for installation. The FB26901 is compatible with a wide range of vehicle makes and models and is a popular choice among performance enthusiasts looking to improve engine performance and efficiency.