Quit playing around with spark plugs that feature Iridium electrodes, Platinum electrodes, Copper electrodes, fine wire electrodes, split electrodes, ring electrodes or multiple electrodes and get serious with silver electrodes! Silver is the best electrical and thermal conductor of any metal. This makes Nology Silver™ the best spark plugs in the world. Period! Combine with Nology Wires & Coils for peak horsepower and torque!