While Audi's upcoming 2015 road-legal version of the R8 supercar continues to wear its camouflage in all the spy pics we've shown you, we now have a new spy video of the manic R8 GT3 prototype, seen here during testing on the Monza Formula One Circuit in Italy. With flared rear arches and new rear bumper and a striking, top-mounted wing, the car also has a larger grille and a new front bumper. It also seems to sport a new transmission and a more potent engine.

Check out the roar of the mighty new R8 GT3, brought to you directly from Italy: