Hi, I have a 68 FB vert and I want to replace my headlights with H4 conversion lenses but am getting confused. What is the size I am looking for? I measure mine at about 5½ inches. The outside ones have two wire and the inside (brights) have three wire. Anyone have part numbers or info on this stuff for a Halogen conversion? Jason

Your inner and outer lights are reversed. Inners should have two wires (high beam only).

Thanks, but what size are these, 5 inch?

Measure the headlamp retaining ring I.D. I believe 5" is correct. They are series 4000 and 4001.