This was not exclusive to any model. I filtered a '58 Savoy 4-door sedan, and it had the same turn key setup.
The bike was completely disassembled and painted, everything on this bike matches, all the way from the complete frame, swing arm on up. The bike rides better than a factor bike rides.
At the time the bike was tuned on the Dyno the numbers showed This exhaust creates some amazing torque, sounds amazing and fits this bike perfectly with the look.