Denso IW16TT Iridium Twin Tip Spark Plugs - Set of 8

DENSOÕs iridium TT plugs are designed for long distance and heavy-use drivers who care about mileage and performance. Engineered with a 0.4Mm diameter iridium centre electrode and a 0.7Mm platinum-tipped ground electrode; the iridium tt delivers more complete combustion giving you superior fuel economy and increased power.