Brand New Genuine Autolite 66 Copper Resistor Spark Plug…
· Genuine Autolite Part # 66
· 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
· Features high alumina ceramic for high dielectric strength and steel shell for installation robustness
