These aluminum beauties replace the shiny (cheap looking?) OEM chromed plastic caps. They are in Honda's Japanese accessory catalog and like most motorcycle parts from Japan are precision made and pricy ($60+, including shipping).
Some of you may ask why spend that kind of money on a simple pair of plugs? I ask - Have you farkled today?
Some of you may ask why spend that kind of money on a simple pair of plugs? I ask - Have you farkled today?

At least now I know the name for it! Apparently it will mutate into the OCJBD...
