ACCEL's Extreme 9000 ceramic wire sets make burnt plug-wire boots a thing of the past. Not enough room in your engine bay? Not enough room to work around your headers? No problem – the ceramic boots on the spark plug end of these specially designed wire kits withstand temperatures up to 2;000 degrees Fahrenheit. The ceramic coating acts as a heat mirror; reflecting infrared energy and heat away from the plug boot; and it's engineered to resist flaking and peeling. 8mm Ferro-Spiral core double-silicone wires deliver maximum energy to the spark plugs with built-in RFI/EMI suppression for street-driven vehicles. Already cut to factory length; these ultra-high temperature wires are rated at 600 degrees Fahrenheit; have 500-Ohms/ft. resistance; feature stainless-steel terminals; and come with straight ceramic boots.