Where is this heat sheild you have? Do you have any pictures? Also, what's the purpose of your ceramic coated engine cover? That'll just absorb heat, won't it? I got rid of my engine cover.
Here's a picture of the underside of the exhaust for those curious souls.
The stock diameter of the exhaust pipes are 2 1/4"
Those are the stock boxes, simply ceramic coated, and they were only coated for a cleaner look. The heat shield I was referring to is the one that is bolted on the exhaust manifold right below the air intake. I do not have a clear picture, since it is now blocked by the intake.