There are at least two options for the headlights. When I upgraded the 403 I went for maximum light output and was surprised to find I had to fit a driver unit which was too big to fit in the headlamp bowl.
For the 406 I chose a bulb with no external driver and is a direct swap with the original. I can't test properly until I have sorted the brakes but the light output looks promising.
It took a couple of attempts to get the right positive earth flasher units with on line ordering. In the end I made a telephone order and that worked perfectly.
I didn't look for a bulb for the clock but the original incandescent unit seems to work happily alongside the LEDs.
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