[john]

Glowing???? BS. That would mean that it is close to melting temp. I would not worry as I have never heard of a turbo or manifold melting. You would have to worry about the aluminum head melting first. Throwing the heat shields on will just "hide" the "glowing" from you and make the turbo and mani hotter by keeping the heat in. It is a good idea to throw them on as may have a small affect on your intake temps.