Magnecor’s KV85 Competition (8.5mm) Ignition Cables feature Magnecor’s exclusive 2.5mm high capacity Metallic Inductance EMI Suppressed conductor consisting of stainless steel wire precisely wound at 200 turns per inch over a ferrimagnetic core. The insulating jacket is made entirely of Magnecor’s exclusive TC-1500-HS high strength aerospace grade silicone rubber, and its single layer construction will prolong the jacket’s insulating ability by conducting extreme heat away from hot-spots that occur near over-the-limit heat sources. The R-100 10mm jacket has a service heat resistance of 700 degrees F (380 degrees C) and up to 1,200 degrees F (650 degrees C) for short burst 3 minutes. Even if limits are exceeded, the silicone rubber will retain its insulating ability until wires are removed from engine.