What makes or breaks a plugwire is not only how well the wire is insulated, but how low of resistance the center core has. These wire sets test 40-50 ohms per foot, while most others test 1500 ohms per foot. Low Resistance
These plug wires do require assembly although the plug end is alread installed. Both HEI and socket style distributor ends are supplied.
Learn how to properly attach new spark plug terminals and boots by reading our tech article. How to Install Spark Plug Wire Ends.
For S/B Chevy with HEI-Style Distributor Cap