The units served a number of uses, and were often customized to suit each law enforcement agency's particular needs. Law enforcement agencies from municipal to government agencies bought nearly 15,000 examples of these units. Many still exist today, either still in some role of law enforcement, from display cars to DARE cars, or in the hands of collectors and racers.
In 1982, the California Highway Patrol asked the Ford Motor Company to produce a capable and lightweight police car due to the bulkiness of current police cars like the Ford Fairmont and LTD /Crown Victoria and the problems incurred with Chevrolet Camaros with their camshafts and engine problems at pursuit speeds. Taking the Fox 5.0 Mustangs in production at the time, Ford produced the Ford Mustang SSP and modified them to suit the needs of the police and law enforcement departments.
It is estimated that nearly 15,000 of these special units were made from 1982 until their discontinuation in 1993 for over 60 law enforcement organizations and government agencies. Their roles ranged from general patrol to pursuit units, with some used in special duties like drug interdiction to academy training units. Several units were specially tasked to help land the Lockheed U2 Spyplane.
The Mustang SSP was essentially a more rugged version of the 5.0 Mustang, with added features (some standard, some optional) not available to the general public. Some of the additional features were:
Depending on which agency bought them, extras like rollcages (installed by Oregon State Police) and power windows (requested by New York State Police ) made each SSP unique to their respective departments. The original configuration of the civilian Mustang with its small rear seat and manual transmission were generally considered ill-suited for a law-enforcement vehicle. Many SSPs had automatic transmissions , to free an officers hand from using the manual transmission stick so that they could use the hand for other duties, such as speaking on a radio.