[Aussie Mike]

A Cobra with sidepipes is difficult to register down here. Most cars start out with an underbody exhaust and then the side pipes go on after the car has been succesfully registered.

I was at the Robnell factory a few months back and saw how they get around the exhaust opening issue. They cut the holes for the side pipes but have a neat little panel that flush fits in the hole. The panel is painted along with the rest of the body work and then if the owner wants to put the side pipes on later the panel can be removed. You should talk to the guys at ERA and see if they can supply something similar with your kit.

Cheers