Replace your old and dirty air filter on your Mustang with a new 5x7
Powerstack Air Filter from JLT! This air filter allows you to improve
your airflow to increase fuel mileage and horsepower. With a washable
and reusable application, this air filter allows you use it more than
once. Although this air filter may be smaller than some kits, it flows
more than the original 5x8 and 5x9 filter.