1 pair of door hinges.
These hinges use multiple needle roller bearings to provide a smooth hinge effect and overcome the common GT40 replica problem of seized door hinges. Most replica manufacturers use a plain sttel bush in the door layup with a bolt to provide the pivot. In use these rust and seize up. By using proper bearings with hardened steel bearing faces these hinges provide for a reliable and consistent hinge mechanism.
https://www.dropbox.com/s/wjwig2chw6nxz2f/Door-hinge-assembly.pdf shows the exploded view of the hinge mechanism.
The hinges bolt into your door mouldings, and should work with other manufacturers mouldings too.