Maximum Motorsports offers springs for Mustang coil-over applications in two diameters: 2.5" for MM Front Coil-overs and 2.25" diameter for MM Rear Coil-overs.
Scroll down to see the MM designed tool used to easily remove the interference that often occurs between the front coil-over spring and the driver-side frame rail of 1994-04 Mustangs.