2015 Mustang GT500 Spied Testing… Or Is That GT350? Mach 1?

We've already been treated to an in-depth first look at the 2015 Ford Mustang, but here's a few pics of something that's yet to take the spotlight.

Spied testing on US roads, this camouflaged Mustang test mule sports a few features that set it apart from the V6, turbo four and V8 versions we've already seen.

Things like a prominent bonnet scoop, 295-section rear tyres and a quad-tipped rear exhaust. Vision-obscuring discs block our view of the brakes, but odds are good that there's uprated hardware there too.

View the story "2014 Ford Mustang: The Lead-Up" on Storify]