The K&N Drop In High Flow Cleanable Air Filter is designed to achieve high, virtually unrestricted air flow while maintaining filtration levels critical to ensure long engine life. The K&N replacement air filter installs in minutes with little or no automotive knowledge and generally adds 1-4 horsepower. Better yet, it is the last filter you'll ever buy for your vehicle, since it is cleanable and comes with a million mile guarantee! The secret to their success lies in the unique characteristics of the k&n filter medium that was originally developed by K&N all those years ago in the dust, sweat and tears of desert motocross racing. They just wanted to win races and stumbled on a cotton filtration technology destined to be great. K&N high flow cotton gauze air filters are washable, reusable and built to last for the life of an automotive or motorcycle engine. K&N air filters consist of four to six sheets of cotton gauze layered between two sheets of aluminum wire mesh. This media is then pleated and oiled to enhance its filtering capabilities and overall performance. K&N Air Filters were created for an environment requiring maximum horsepower and enhanced acceleration in addition to protection from the dirt and dust of off-road racing. The result is an drop in replacement air filter that allows dramatically more air into an engine, is washable and reusable, and will protect your engine for the life of your vehicle. The part number for this filter is E-1550 and it fits 1975-1976 Ford Mustang II 302 Carbureted V8 models.