A belly pan question

[CamaroAJ]

on alot of high end newer cars they are running full length belly pans that also enclose the exhaust system. how are they controlling the heat in the tunnel? i know i won't be able to make a full pan like they are but i was wondering how they were doing it.

if i were to try a full pan my exhaust will be stainless and i though about having it coated and then wrapping it to help but it will still get hot.