ChipsWithDips

I'm a firm believer in header wrap.

When you switch to an aftermarket header you generally end up with more surface area than the stock headers, which means even more heat radiating off of them, and heat convection from the air passing over them. So you will be increasing the amount of heat given off by your headers, and at the same time you are removing your factory headshields, which by the way are there for a reason.

Keeping that heat in your exhaust will keep your exhaust gas velocity high, which is good for scavenging and overall performance/efficiency.

Excessive underhood temperatures can hurt performance, hinder your cooling system, wiring harnesses can get damaged or melt, rubber will dry and crack sooner, electronics could fail sooner, etc.

If you decide to wrap, I'd recommend the DEI "Titanium" wrap(just a name, not actually made of titanium). It's a lot higher quality than generic fiberglass header wrap.