"Here the AccuFab exhaust has been completely wrapped with Thermo-Tec's wrap. The primary purpose for the wrap in this situation is the reduction of radiant heat within the engine bay. We have successfully used this process for many years in similar applications such as on Lamborghinis and Ferraris for the exact same reason."
I had my entire header and exhaust jet coated, looks cool and I think is the safest and neatest way of achieving the heat shield. get in touch with the GT guys ! page two of their pics on the website, you see it on photo three..