John and Gordon
For clarity. The photo shows 4 manifolds for DCOE 2. The one on the right is a 1600 Veloce, the three on the left are some version of the 1300. The differences may not be clear in the photo but each is a different casting. Yes it fits your 1300 SS, Giulietta Veloce, SZ and so on. Two of these there have the often spoken of "Z" cast into the manifold, which of course does not mean Zagato. Also notice, (if you can see it) one of these has a boss and thread for what appears to be a vacuum fitting for a brake booster (goes into the rear port like a 105). I have no idea which car this could have been from since Giulietta's didn't have boosters and 105 Giulia's (once they added boosters) didn't have this kind of manifold. Another Alfa mystery.