The COBB Turbo Blanket is designed to limit the amount of heat that is transferred from your turbocharger to your engine bay as well as keeping hotter exhaust gases that exit the system faster through decreased density. By limiting the amount of transferred heat, you extend the life of your under hood components, decrease intake temps, and improve the response from your car. Constructed with a fragmentized fire retardant volcanic rock outer layer (Rated 1500 degrees F Direct Heat / 1800 degrees F Radiant Heat) and internally insulated with high temperature calcium magnesium silicate wool (Rated 1800 degrees F Direct Heat / 2300 degrees F Peak Heat).