Denso ITV27 Spark Plugs - Full Set
ITV27 For Highly Powered Focus RSs
Iridum Spark Plugs for RS Focus. A new generation of high performance spark plug that the world smallest Iridium electrode that is a mere 0.4 in diameter. The smaller the electrode the more concentrated the electric potential at the electrode. The stronger the the electric field, the lower the required voltage. As a result of this the engine starts easily, and the acceleration improves.