Thermo-Tec 11248 Exhaust Jacket Kit for 8 Cylinder The jackets cover the tubes vertically allowing for a consistent fit This product uses Thermal Conduction Technology (TCT) developed by Thermo-Tec and can be applied with the headers in the vehicle This TCT conducts heat across the wrap's surface which controls heat build-up and dissipation The material is 8 inches wide and either 12 or 16 feet in length The jacket can withstand continuous temperatures up to 2000 degrees Fahrenheit