Cobb Tuning High Flow Air Filter - Ford Mustang Ecoboost FM/FN 15-21COBB High Flow Filters are designed to permit very high flow rates, minimize restriction, maximize filtration and provide a long life filter. Using proprietary Woven cotton and metal mesh with a precision molded rubber base, the COBB High Flow Filter ensures that only clean air passes into your engine for maximum efficiency. Why not treat your car to fresh air with a COBB High Flow Filter and let it reward you with increased power and fuel economy!