Fram 665 Autolite Copper Core Resistor Spark Plug

The Fram 665 Autolite copper core spark plug delivers quick starts, good fuel economy, and smooth acceleration for a wide range of automotive applications. This resistor-type spark plug features a full copper core electrode that provides superior thermal conductivity and consistent performance in all operating conditions.

Key Features:

• Cold-formed steel shell with precision rolled threads for greater durability and reduced wear
• Copper-glass seal bonds insulator and terminal post center electrode to ensure full voltage at spark gap, creating a 100 percent leak-proof seal
• One-piece terminal post adds strength and reliability
• Multi-rib insulator reduces flash-over danger to prevent misfires
• Built-in resistor reduces radio frequency interference (RFI) and electrode erosion
• Full copper core electrode for excellent thermal conductivity

Autolite copper core spark plugs are manufactured to meet or exceed original equipment specifications, providing reliable ignition performance and long service life. The precision-engineered design ensures consistent spark delivery for optimal engine performance across various driving conditions.