Just fitted one to mine...fitted great, can connect the heater exchanger hot air cardboard pipes, actually easier than on the single empi bugpack it had before. Best done with rear balance removed, they aren't straight, need to bend around so uses some woven unsulator to stop the cardboard burning through, time will tell if that works.
FYI bought mine through vintage speed website and saved loads compared to heritage on not paying extra on special manifolds needed for the single carb preheat pipe.
Took a couple of weeks to arrive but knew that when I bought it.
Well packed for shipping when arrived. Used some exhaust paste on fitting as recommended.
Bit louder than single bugpack on tick over possibly quieter on motorway.