Autolite 308 Copper Resistor Automotive Replacement Spark Plugs (4 Pack)

Autolite 308 Copper Resistor spark plugs (4 pack) deliver reliable starts, improved fuel economy, and smooth acceleration. Featuring a full copper core electrode for higher thermal conductivity and a copper-glass seal that ensures a leak-proof insulator-to-terminal bond, these plugs help maintain full required voltage at the spark gap. Constructed with a cold-formed steel shell, precision rolled threads, and a one-piece terminal post for strength. Multi-rib insulator reduces risk of flash-over and misfires; the internal resistor reduces radio frequency interference (RFI) and electrode erosion. Pack of four, universal-fit replacement plugs provide dependable industry-standard performance and long-lasting durability.

• MAXIMUM PERFORMANCE: Every Copper Spark Plug has a full copper core electrode which provides higher thermal conductivity for better performance in all conditions
• IMPROVED DURABILITY: All Autolite spark plugs are Leak proof and come with a heat fused internal seal for long lasting durability
• CONSTRUCTION: These replacement spark plugs have a copper-glass seal which bonds the insulator and the terminal post center electrode together
• FUEL EFFICIENCY: The Autolite copper automotive replacement spark plug are guaranteed to deliver quick starts, better fuel economy and smooth acceleration
• AUTOLITE ADVANTAGE: Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. You can count on our copper plugs for performance and value, backed by decades of experience and passion