Designer plug wire sets come in distinctive, highly visible colorsPre-cut and have the plug/coil boots and terminals already installedBoots and wires are made from extra-high-temperature silicone, which gives protection up to 600°FSpiro-Pro core provides up to 10 times the conductivity of a standard carbon-core wireLow resistance means they run cooler and last 3-4 times longer than carbon-core wiresDesigned for electronic ignitions, but also work great on point typesAvailable in prefitted styles and universal styles with 90°, 180° and 135° plug bootsUniversal wire kits feature 24" wire leads (not for Twin Cam)Sold in pairsMade in the U.S.A.