Hey, so I'm going to be purchasing some UEL replica headers from America soon and was wondering if heat wrap will help them last longer or deteriorate faster due to holding moisture which can lead to rust?

My car is an n/a Impreza RS 2.5 '02 - which makes me think is it really necessary?

Heres the link for the headers;

97-05 Subaru Impreza 2.5L N/A Performance Exhaust Manifold Header Extractor | eBay

They say they're already stainless but you can never trust ebay. So, should I wrap them or leave them as they are?

PS: Ceramic coating is out of my budget