Autolite Copper Core Spark Plug, Resistor Fits select: 1984-1996 FORD F150, 1984-1997 FORD F250

Autolite Copper Core spark plugs deliver quick starts, good fuel economy, and smooth acceleration. Copper Core spark plugs feature high alumina ceramic for high dielectric strength, and a steel shell for installation robustness. These spark plugs are engineered with a high nickel alloy center and ground electrode for extended life.

Autolite Copper Core Spark Plug, Resistor Copper-glass seal bonded insulator, terminal post, and center electrode provide a tight seal that is 100 percent leak-proof Multi-rib insulator reduces danger of "flash-over" to prevent misfires Full copper core electrode improves heat transfer and optimizes plug life Copper core center electrode provides higher thermal conductivity