Autolite 766 Copper Resistor Automotive Replacement Spark Plugs (4 Pack)

Autolite Copper Core Spark Plugs deliver quick starts, good fuel economy, and smooth acceleration. The copperglass seal bonds insulator and terminal post center electrode together to ensure full required voltage at spark gap, creating a gastight seal that is 100 percent leakproof. Copper Core spark plugs feature a coldformed steel shell and precision rolled threads, and a onepiece terminal post that adds strength. The multirib insulator reduces the danger of flashover to prevent misfires, and the resistor reduces radio frequency interference (RFI) and electrode erosion. The full copper core electrode provides better performance in all conditions. Autolite Copper Core plugs are your industry standard.