Ceramic coating is about the only thing that can handle extreme heat. It also traps heat in. This can keep the under hood temps down a little and has another great feature. The turbine works off of heat-energy in the exhaust. The more heat 'trapped' in the turbine housing means more energy is available to drive it, thus, a slightly more efficient turbo. Spend the money, you will be glad ya did. You can also wrap it.
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