Fram Copper Core Spark Plug with Resistor

The Fram Copper Core Spark Plug with Resistor line gives you dependable ignition for a wide range of cars and trucks. These resistor spark plugs are sold under the Autolite name and are built around a full copper core electrode. Copper conducts heat well, so the plug can run cleanly and perform consistently in all kinds of operating conditions. The line is a popular replacement for worn plugs and helps restore quick starts, good fuel economy and smooth acceleration.

Key Features:

• Full copper core electrode: conducts heat away from the tip for steady performance.
• Built-in resistor: reduces radio frequency interference (RFI) and electrode erosion.
• Cold-formed steel shell with precision-rolled threads: helps the plug install smoothly and seat securely.
• One-piece terminal post: adds strength.
• Multi-rib insulator: helps reduce the risk of flash-over.
• Copper-glass seal: bonds the insulator, terminal post and center electrode. This helps deliver full voltage at the spark gap and a gas-tight seal.

Copper core plugs are a proven, cost-effective choice for OEM-style replacement. Each part number in the line is built to its own specification for thread, reach, seat style and heat range.