0775.92.590 (077592590) Rear 58mm Intake Manifold for Dellorto PHM carbs
0765.92.580 (076592580) Front 58mm Intake Manfold for Dellorto PHM carbs
You get what you see here, the right angles found on bevel drive Ducati 900 Super Sports with 58mm stud spacing measured center to center. The front one has a major bend to it, the rear manifold is straighter with a very minor bend.
You can choose to get them by themselves, or with 2x rubber intake manifold insulators for between them and the heads, and/or I can drill and tap the spots for and include the cheezehead screws and aluminum crush washers used for the vacuum ports - whatever you want. Of course, you can get them as is without the holes drilled and tapped to save some money and you can do the job yourself in order to be able to properly sync your carbs.