Bosch Super Plus, with a heavy-duty yttrium-enhanced copper core center electrode, is the longest lasting copper core spark plug on the market. - Heavy-duty yttrium-enhanced copper core center electrode provides superior reliability and durability for 50% longer performance life vs. even OE plugs
- Tapered, v-profile nickel chromium ground electrode improves starting in cold weather and increased fuel ignitability
- Nickel-plated rolled threads provide anti-seize properties and corrosion protection
- Metal glass fused resistor for maximum interference suppression
- Angular, five-ribbed insulator design prevents misfire due to current leakage
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| Alternate/OEM Part Number(s): WR10FC |
