NGK Iridium Spark Plug - BKR6EIX-11Although they come in at a higher price than standard, iridium NGK Spark Plugs offer a longer service life than a standard nickel tipped spark plug. While you're investing more money in your spark plugs initially, you won't need to change them as often and can even save money in the long run on further spark plug replacements and servicing costs. While nickel alloy spark plugs offer a service life of anywhere from 20,000 40,000kms, NGK Iridium IX