Replacing the Spark Plug on your vehicle? The Autolite 4316 is a direct replacement with the fit of an Original Equipment part.Since 1936, Autolite has been a trusted leader and innovator in spark plug technology. You can count on our copper plugs for performance and value, backed by decades of experience and passion Copper-glass seal bonds insulator, terminal post center electrode together; assures full required voltage at spark gap; gas-tight seal; 100% leak proof Multi-rib insulator reduces danger of “flash-over” One-piece terminal post adds strength Cold-formed steel shell precision rolled threads Full copper core electrode provides better performance in all conditions
