The Bosch Super Plus Spark Plug utilizes an yttrium enhanced copper core center electrode, making it one of the longest lasting copper core spark plug on the market - by 50% versus even OE plugs. Bosch Super Plus also features a tapered, v-profile ground electrode for improved cold starts and better fuel ignitability. Center Electrode Core Material: Nickel-Yttrium and Copper - Center Electrode Tip Material: Nickel-Yttrium - Ground Electrode Tip Material: Nickel-Chromium Product Features:OE-Equivalent and direct fit application.Heavy-duty yttrium-enhanced copper core center electrode.Tapered, v-profile nickel chromium ground electrode.Nickel-plated rolled threads.Metal glass fused resistor.Angular, five-ribbed insulator design.Electrode gap is factory set and never requires adjustment.Anti-seize and corrosion protection. Bosch Super Plus Spark Plugs deliver quality performance based on technology that's proven on racetracks around the world in the most sophisticated racing engines
