The MSD 8.5mm Super Conductor is the ultimate performance wire! Its extremely low-resistance combined with the ability to suppress Electro Magnetic Interference is a combination that defies the common laws of physics. Less resistance means more energy is going to make it to the spark plug to ignite the air/fuel mixture. The Super Conductor uses a copper alloy conductor resulting in less than 50 ohms per foot of wire! This ensures tha t the most energy es it to the spark plug. This combination is encased in a heavy duty sleeve that will withstand abrasion and high temperatures. Cap off each end with the Dual Crimp Terminals and you have the best wire available!