Product Overview
NGK 5553 - BKR6ES-11 Spark Plug 8 pack These are the copper electrode spark plugs for the D2, not the platinum or iridium which are available here: In our experience the copper plugs give extremely long life, probably 50-100k miles before needing replacement and represent a better value than the much more expensive Iridium or Platinum plugs and the D2 ignition system has more than enough power to make sure these fire in the worst of conditions.
