Are these inlets prone to heat soak?
The fitting kit includes a Ferriday thermal gasket so the block doesn't transfer too much heat to the inlet, it does get fairly warm after a long drive but air flows through it so quickly that any heating effect is negligible!
The design of the mountune induction system means that the air going in should be relatively cool too - the filter is largely enclosed and is fed by a cold air feed entering the box from underneath...