Wrapping headers and exhaust maintains hotter exhaust gases that exit the system faster through decreased density. Increased exhaust scavenging is produced, along with lower intake temperatures. Exhaust Insulating Wrap withstands continuous heat up to 2000°F, and contains no asbestos.
Thermo-Tec exhaust wrap will not over-insulate a system when properly installed due to a proprietary coating developed by Thermo-Tec - Thermal Conduction Technology (TCT) - that conducts heat across the wraps surface. This coating controls heat build-up and dissipation.
The only difference is the color. The 08-11154 is black, and 08-11152 is off-white.
It is not adhesive. Per their instructions you would use clamps to attach it.