If you want to replace your Karmann Ghia headlights or you have a USA imported KG (with Sealed Beams) use then:
2 x n° 0613-2: H4 optic
2 x n° 0632: KG headlight rings
2 x n° 0661: H4-lamp 12V or 0661-01 6V
1 x 0661-20: lamps 12V 4W or 0661-10 6V 4W
This is the cheapest solution with a high light-intensity.