Ok I was looking at the magnaflow dual exaust and it says you need a GT rear fascia which is cool. My question is if I bought the roush body kit which is for a GT can that go on my stang? therefor I can use the dual exaust

 

Yes it will go on. There is only cosmetic difference that are small between the v6-GT-Mach1's-cobra's underneather there all the same unibody.

 

just make sure it isn't the roush kit that requires the $900 side exit exhaust kit.