 Like the Callaway C12, the only body panels the car retains from the C6 are the roof panel, the rear hatch and the rear view mirrors.The engine is a 6.2-liter (378 cu in) Callaway-modified "LS3" V8, powered by an Eaton supercharger with air/liquid intercooler integral to intake manifold.Maximum manifold pressure is 50 inches Hg, absolute.