C5 gto

[bobadame]

If you connect the shield to the heat source you will be creating a direct path for the heat to conduct directly into the shield. It would better for the shield to not touch the exhaust system. Attach it to the under body instead. This is still a conduction path but it will be conducting from a lower temperature source.

Stainless steel does conduct heat much slower than aluminum but it also looses heat much slower. If you direct fresh air into the space between the body and the heat shield through a couple of NACA ducts, the aluminum will dissipate heat into the air stream and be carried away much quicker than if it were made from stainless. This is why radiators are made from aluminum instead of stainless steel.