Autolite copper core spark plugs provide quick starts, superior fuel economy, and smooth acceleration. A copper-glass seal bonds the insulator and terminal post center electrode together, ensuring the required voltage across the spark gap and creating an airtight seal that is 100% leak-proof. Copper Core spark plugs feature a cold-formed steel shell with precision-wound threads and an integrated terminal post for added strength. Multi-rib insulators reduce the risk of "flashover" and prevent misfires, and resistors reduce radio frequency interference (RFI) and electrode erosion. Full copper core electrode provides better performance in all conditions. Autolite copper core plugs are the industry standard.


Brand: ‎Autolite
Package size: ‎10.79 x 8.89 x 2.79 cm; 191 g
Item model number: ‎3923
Discontinued by the manufacturer: ‎No
Product weight: ‎191 g