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Accel now offers the cure for burnt spark plug boots with Extreme 9000 Ceramic wire kits. The 8mm Ferro-Spiral core wire now has ceramic boots on the spark plug end of the wires. Ceramic boots withstand up to 2,000°. Great for running headers with close tolerances, an engine bay with little room, or an RV with boots that melt because of heat. Ultra high temperature double silicone construction wire rated at 600 Fahrenheit peak. 500 ohms/ft Ferro-Spiral core developed for performance use. SBC only.