The exhaust is made by
these people in Italy . You'd need to go to their catologue area on their website, and select their "Topline" range for the Coupe.
I believe there is a question over the safety of these twin exhaust systems, because of the location of the pipe which sits almost directly underneath the fuel filler pipe. In the event that the fuel filler hose develops any leaks or holes, fuel will drop on the hot exhaust pipe, and possibly *boom*. I guess some kind of shielding could be installed to prevent this.
The rear bumper looks like a modified Zender rear lip.
Gazella sell the Ragazzon system. It's not cheap. But the looks and sound are gorgeous.
Just that question on whether it's a fire hazard worries me.