I have nine Accel sparkplug wires with a ceramic boot on the spark plug end. The set is for an LS engine. I have nine wires because I had one left over from another build. An extra could come in handy if you're not careful removing the wire from the plug. The clasp that holds the top of the spark plug can come off if you're careless. A couple of the boots have marks on them where they contacted the exhaust system. The set has very few hours on it and maybe 1,500 kms.