The Super Conductor wire is a high performance wire from the inside ou

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 ferro-magnetic impregnated center core an EMI choke is created keeping any interference inside the wire.