Autolite 306 Copper Resistor Spark Plug (1 Pack)

Autolite Copper Core Spark Plugs are designed to provide maximum performance, improved durability, and enhanced fuel efficiency. These spark plugs feature a full copper core electrode that offers higher thermal conductivity, ensuring better performance in all conditions.

The copper-glass seal bonds the insulator and terminal post center electrode together, creating a gas-tight seal that is 100 percent leak-proof. This construction ensures that the full required voltage is delivered at the spark gap, enabling quick starts, good fuel economy, and smooth acceleration.

Autolite's spark plugs are built with a cold-formed steel shell and precision rolled threads, as well as a one-piece terminal post that adds strength. The multi-rib insulator reduces the danger of "flash-over," preventing misfires, while the resistor helps to reduce radio frequency interference (RFI) and electrode erosion.

Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. The company's copper plugs are backed by decades of experience and passion, delivering performance and value to customers. Autolite Copper Core spark plugs are the industry standard, trusted by drivers for their reliable and efficient performance.

The Autolite advantage is evident in the construction and features of these spark plugs. The leak-proof, heat-fused internal seal ensures long-lasting durability, while the copper-glass seal bonds the key components together for a secure and effective design.

Drivers can count on Autolite Copper Core spark plugs to provide quick starts, better fuel economy, and smooth acceleration, even in the most challenging conditions. These spark plugs are engineered to deliver maximum performance, backed by the brand's reputation for innovation and quality.

Whether you're looking to replace worn-out spark plugs or upgrade your vehicle's performance, Autolite Copper Core spark plugs are the trusted choice. With their advanced features and Autolite's commitment to excellence, these spark plugs offer the perfect balance of power, efficiency, and durability.

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