Designed to meet or exceed OE designs to deliver dependable performance for all outdoor power equipment and recreational vehicles Screw machined steel shell and precision rolled threads One-piece terminal post for added strength Multi-rib insulator reduces danger of “flash-over” Copper-glass, non-resistive seal bonds insulator, terminal post, and center electrode together ensures full required voltage at spark gap
Autolite Copper Core spark plugs deliver quick starts, good fuel economy, and smooth acceleration. The copper-glass seal bonds insulator and terminal post center electrode together to ensure full required voltage at spark gap, creating a gas-tight seal that is 100 percent leak-proof. Copper Core spark plugs feature a cold-formed steel shell and precision rolled threads, and a one-piece terminal post that adds strength. The multi-rib insulator reduces the danger of “flash-over” to prevent misfires, and the 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.