Do these headers need exhaust gaskets or hardware when I install them?

You'll need quality exhaust gaskets at the manifold flange — these don't ship with them. Fasteners depend on what you're connecting downstream; check your existing exhaust system first.

Will these bolt straight to my stock LS2 manifold ports?

Yes, these mount at the factory bolt locations with no drilling or welding required. A straightforward bolt-on swap.

Should I wrap these or paint them before installation?

Bare stainless develops a natural patina over time and won't rust. Paint or wrap is purely cosmetic — entirely your choice.