A good muffler shop with a pipe bender could actually make you tail pipes to fit them, IRS (Cobra) tail pipes will only fit it you have Independant Rear suspension like I have on my GT, that is why I had to get Cobra exhaust, if anyone wants a Cobra system I have a stock 03 Cobra system I am not using for anything, but again, you couldn't use the tail pipes.
Rick Kilpatrick, AAS Automotive Systems Tech, Alamance Community College, Class of 99. 06 5 speed manual Mustang with Pony pkg : GT Mac Mufflers, true duals with one custom pipe. 2.5" system. GT bumper cover, all installed March 7&8 2006. AFE Stage 1 CAI, Motoblue Underdrive pulley, GT aluminum shifter knob, honeycomb rear blackout panel,and dash kit installed. Roush hood scoop and side window louvers installed. SS taillight trim has been installed, new alum. GT steering wheel installed.