I don't know about the cage for sure but it might have come that way from the factory. The ITB's did not come from the factory, the manufacturer of the ITB's currently on the car are not historically correct. But no worries he has the correct set, but they aren't big enough to hold tennis balls like the ones currently on it. What you can't tell from the pics is the doors, fenders, hood (i think) and trunk (I think) are all fiberglass. All that fiberglass did come from the factory.