ACCEL now offers the cure for burnt spark plug boots with Extreme 9000 Ceramic wire kits. The 8 Millimeter Ferro-Spiral core wire now has ceramic boots on the spark plug end of the wires. The ceramic boots will withstand up to 2,000 Degrees Fahrenheit. If you are running headers with close tolerances, have an engine bay with little room, or an RV with boots that melt because of heat, these wire kits are the solution! The Extreme 9000 Ceramic wire sets have ultra high temperature double silicone construction wire rated at 600 Degrees Fahrenheit peak. The wire uses a 500 Ohms Per Foot Ferro-Spiral™ core developed for performance use. It provides excellent energy delivery to the spark plugs, while providing the highest level of RFI/EMI suppression. The Extreme 9000 Ceramic wires also feature stainless steel spark plug terminals for maximum spark energy to the plugs.