Dynamo Regulator 6v 50amp. 111-903-801D

Volkswagen improved the 6-volt power circuit from the 35Amp 90mm generator to a more powerful 105mm 50Amp generator before upgrading to 12-Volts. The 50Amp 6-volt regulators are long time discontinued by Bosch or any other brand. 

The 6-volt 35Amp regulator mounts directly on top of the 90mm generator but the 6-volt 50Amp regulators mount on the firewall or under your back seat, depending your car model and also on Porsche 356.