This ignition wire set features red wires with a resistor wire core that has 40-percent more fire power than most conductors. It is a must for multiple spark ignition systems, on-board computers, electronic ignitions and it eliminates radio frequency interference. It also includes silicon insulation, a fiberglass jacket, and vibration proof double spring lock terminals. It is available with 90-degree spark plug boot ends and is designed to withstand temperatures over 600-degrees F.