they will run over the diff, around the coilover and line up along side fuel tank directly under the frame rail--you need to cut the extension loose and slide forward to fit the car

the mufflers can be mounted forwrd of the axle with stock mustang hanger rubbers by simply adding a cross piece for the hangers

as on any car you will need to route the pipes from headers to the mufflers

take a look at a 2003 or 2004 mustang with stock exhaust(if you can find one!!!!)