Champion FB77WPCC / CCH1230 Industrial Spark Plug Replaces 301-6663 Champion&174;pioneered the use of iridium in aviation & industrial applications nearly 30 years ago. Now iridium, which has a stabilizing effect on ignition voltage & excellent wear characteristics, is quickly becoming the technology of choice for engine manufacturers worldwide. Iridium pin welded to the copper core centre electrode Platinum pad welded to the copper core ground Champion&174; Iridium center electrode & laser-locked platinum ground electrodes ensure maximum life Champion&174;s fine-wire electrode & platinum v-trimmed ground electrode produce the sharpest spark focus Further reduces erosion maintaining the gap & increases life If you are unsure as to whether this is the correct part for your vehicle, please don't hesitate to contact us. Alternatively please use the cross reference table above.