Chev 454 Vortec 96 - 00 ACCEL Extreme 9000 Ceramic Spark Plug Leads # ACC-9043CChev 454 Vortec 96 00 ACCEL Extreme 9000 Ceramic Spark Plug Leads # ACC 9043C ACCEL now offers the cure for burnt spark plug wire 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. The ceramic boots will withstand up to 2,000 degrees F. 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,