Autolite Copper Core Spark Plug, Non Resistor

Autolite Copper Resistor Spark Plug deliver quick starts, good fuel economy, and smooth acceleration. The copper-glass seal bonded insulator, terminal post, and center electrode ensure a tight seal that is 100 percent leak-proof, and the full copper core electrode improves heat transfer and optimizes plug life. 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, Non Resistor One-piece terminal post adds strength Resistor reduces radio frequency interference (RFI) and electrode erosion The multi-rib insulator reduces the danger of flash-over to prevent misfires copper core center electrode provides higher thermal conductivity.