Autolite 3924 Copper Resistor Spark Plugs (4 Pack)

Autolite Copper Core Spark Plugs are known for their exceptional performance and reliability. Featuring a full copper core electrode, these plugs offer superior thermal conductivity, ensuring optimal performance in all conditions. With their copper-glass seal, the insulator and terminal post center electrode are bonded together, creating a gas-tight, 100% leak-proof seal.

The construction of these spark plugs is designed for improved durability. The heat-fused internal seal and the precision-rolled threads of the cold-formed steel shell contribute to their long-lasting reliability. Additionally, the one-piece terminal post adds strength to the overall design.

Autolite Copper Core spark plugs are engineered to deliver quick starts, excellent fuel economy, and smooth acceleration. The multi-rib insulator reduces the risk of "flash-over," preventing misfires, while the resistor helps to minimize radio frequency interference (RFI) and electrode erosion.

Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. With decades of experience and a passion for high-quality products, Autolite's copper plugs are designed to provide both performance and value. Customers can count on the Autolite Advantage, which ensures that these spark plugs meet the industry's highest standards.

MAXIMUM PERFORMANCE: Autolite Copper Core spark plugs feature a full copper core electrode, providing higher thermal conductivity for better performance in all conditions.

IMPROVED DURABILITY: 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 that bonds the insulator and the terminal post center electrode together, ensuring a secure and reliable connection.

FUEL EFFICIENCY: Autolite copper automotive replacement spark plugs 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, providing customers with high-quality products backed by decades of experience and passion.

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