VW Type 1 - Oil Pumps. The one on the left is a 26mm pump to be used for a 3 rivet flat cam gear... cannot be used with the Type 4 engine!

The one in the middle is a 30mm pump to be used with a 4 - rivet dished cam gear.

The one on the right is a 32mm hi-performance full flow pump(outlet plugged) used with a 4 - rivet dished cam gear also and full flow cap!

Only the 30mm and 32mm can be used with the Type 4 engine, which has a dished cam gear and with either the stock system or remote system.
The full flow 32mm pump is used where the stock oil filter and oil cooler is eliminated and... a remote oil filter and cooler must be used with a full flow pump cap.
The 30mm pump can also be modified for a remote full flow system by simply blocking the outlet, and forcing the oil through a full flow pump cap.

The 30mm pump is the one that will be used with the remote system. The oil cooler size has yet to be determined.