Difficult to see from photo, but yes RG3 stamped on both outward pipes, and 'race use only' stamped on the chrome bands that join the tips to the exhausts.
Colour of tips looks a bit odd, the colour should be a gold/champainge colour...they look like the stock ones, but again cant really see from photo.
Found the link ...thanks,
All sounds a bit odd, a quick look at mine has MV Agusta only stamped on the two outer pipes and Arrow RG3 stamped on the two inner pipes, and colour is all wrong.
I looked at my stock exhaust and they have the same stampings as the ebay picture.