Bosch 7973 HR9ACY Super Plus Spark Plug, Pack of 1

Bosch Super Plus spark plug has a premium copper core plus yttrium enhanced center electrode providing extended performance life over conventional copper core spark plugs.

• Metal glass fused resistor maximizes interference suppression
• Nickel-plated rolled threads provides complete anti-seize and corrosion protection
• Angular, five-ribbed insulator design prevents misfire due to current leakage
• Tapered, v-profile nickel chromium ground electrodes improves cold start performance and increases fuel ignitability
• Heavy-duty yttrium-enhanced copper core center electrode for superior reliability and increased resistance to spark erosion for a 50% longer performance life vs. even OE plugs