The Original Exhaust Insulating Wrap was developed almost 20 years ago by Thermo-Tec. Exhaust Insulating Wrap is an innovative way to create more horsepower and reduce temperatures under the hood. Wrapping headers with Exhaust Insulating Wrap maintains hotter exhaust gases that exit the system faster through decreased density. This produces increased exhaust scavenging, as well as lower intake temperatures. Exhaust Insulating Wrap withstands continuous heat up to 2000-DegreeF (1095-DegreeC) and it contains no asbestos. Exhaust Insulating Wrap, available in natural and graphite black colors, is sold in 15 ft. (4.5 Metre) and 50 ft. (15 metre) rolls, 1 inch (25mm) and 2 inches (50mm) wide. All Exhaust Wrap has a low profile 1/16 inch thickness.