Fram AR51 Autolite Race Series Spark Plug

The Autolite AR51 Race Series spark plug is engineered with advanced performance technology for racing and high-performance applications. Designed to deliver reliable ignition under extreme conditions, this plug features cutting-edge construction to maximize power and minimize misfires.

Key Features:

• Multi-rib insulator design prevents flashover and provides superior electrical insulation
• Copper core center electrode enhances heat dissipation and improves conductivity
• Large cut-back ground electrode with nickel plating resists wear and erosion
• Extended insulator nose sealed design resists carbon fouling in rich fuel conditions
• Double terminated suppressor delivers excellent EMI (electromagnetic interference) suppression
• Engineered for racing engines and high-performance street applications

This race-proven spark plug provides consistent performance in demanding environments where standard plugs fail. The AR51's robust construction and heat range make it suitable for modified engines running advanced ignition systems and aggressive fuel mixtures.

Note: Spark plugs are priced individually but typically sold in sets of four for complete engine applications.