Need a few extra horsepower to get your rig going? Try installing a K&N Filtercharger in your tow vehicle this year. A Filtercharger can actually double airflow, which, in turn, can add up to 15 extra horsepower. Gain longer service life and improved throttle response with a reusable, cleanable K&N Filtercharger Air Filter. No modification is required to the stock airbox. This filter fits gasoline-powered Ford E-series vans and F-series trucks 1987-1997 and Class C Motorhomes 1987-1995. Does not fit diesel engines. Flat panel filter measures 12 13/16 x 5 3/4 inches (325 x 146mm).