I have no real info on that, but my best guess would be no, or possibly if u are willing to "mold" the pipes a little.
Considering I haven;t seen/noticed any H-pipes that fit both Sn-95 stangs and new edge stangs of any varieties, I have to imagine a bit changed under the car with the restyle.
Also I heard something about Mach's having their own port matched exhaust manifolds.
But who knows, weirder things have happened, and the Mach's engine is an evolution or the Cobra's.