Do I need gaskets and bolts to install this?

The header assembly itself is included. You'll need exhaust gaskets and OEM or quality replacement bolts to complete the installation — these are not bundled with the header.

Can I install this without removing the engine?

Most engine bay headers on this platform can be accessed and installed from above or underneath with standard hand tools, but tight clearances mean patience and potentially dropping the subframe slightly. Check fitment details and your service manual before committing.

Does this need to be painted or ceramic coated?

Stainless steel won't rust, but bare stainless can discolor under heat. Many owners leave it bare for the look, while others apply high-temp ceramic coating for aesthetic protection. Your choice — the header functions either way.