The 1991 Mustang LX 5.0 (302) coupe was Ford code P41E and was referred to as a "sedan". This sedan is often called a coupe, notchback, or just plain notch and was available with either an automatic transmission (AOD) or the T-5 5 speed manual transmission.

A few of these 5.0 sedans were special ordered by law enforcement agencies or police departments and are referred to as "SSP". There were 2 special buck tags located near the cars radiator support that signified that the car was a SSP. These cars used the standard 225 hp 5.0 (302) engines as found in the LX 5.0 or GT cars but they had several modification including handling packages, reinforced flooring, cooling, braking, and electrical components that lent themselves to heavy duty highway cruising and police pursuit work. There were only 385 of these special ordered sedans built, so in respect, they are quite scarce.

The sedan or coupe was the lightest of all Mustang models produced in 1991 and both the SSP and regular production 5.0's are sought after by enthusiasts and collectors.