They will fit on your car, but they are skinnier than your stock tires. If you have the 17" mustang wheels, they should be 245/45/17. So these tires aren't going to have as much contact patch. I run 265's on the front and 295's on the back. So you can see 215's are pretty thin for our cars.
__________________ C&L 80mm mass air and True Flow pipe, Mac CAI, BBK 65mm tb, Steeda non-piggy back ud pulleys, MGW shifter, RAM HD clutch and aluminum flywheel, 3:73 gears, 2.5" Dynomax o/r x pipe, 3" MAC cat back system w/ 3 1/2" tips, Kenny Brown(front and rear strut tower brace, caster plates, subframe connectors,extreme matrix brace,jacking rails, torque brace, lowering springs), Bilstein shocks, 03-04 Cobra(side scoops, rear bumper cover, top), 6pt roll cage, white FR500's, FMS 2000 Cobra R air dam. | 
Rims and Tire Help? 1995 Mustang GT 
if looking for more traction and all will half to upgrade to bigger tires . cool thx
