Spark plug wires have two main objectives; transfer the spark energy and suppress the Electro-Magnetic Interference (EMI) that the spark voltage creates. The MSD 8.5mm Super Conductor delivers the best of both worlds! MSD uses a special copper conductor keeping resistance under 50 ohms per foot! Even with this low resistance, the wire retains high EMI suppression capabilities. By wrapping the conductor tightly around a ferromagnetic impregnated center core an EMI choke is created keeping any interference inside the wire. The Super Conductor wire is a high-performance wire from the inside out. The outer sleeve is a combination of silicone and synthetic materials for supreme resistance against heat, chemicals and abrasion. Thick boots with more material also help guard against spark arcing to ground and special dual crimp terminals grip the conductor and the sleeve of the wire so there is no chance of the terminal pulling off the wire. Resistance less than 50 ohms/ft. for superior sparkExtra hvy glass braid; strong dielectric insulatorHelically wound copper alloy conductor40 Feet of conductor wound in one foot of wire8.5mm jacket protects from high heat or abrasionSilicone and synthetic heat resistant bootFerro-magnetic impregnated core creates EMI chokeCore made with DuPont kevlar to add tensile strengthExtra-long 8.5mm wire so you can cut to your desired lengthIncludes Mini-Stripper-CrimperWire Lengths: 2x 30"