Do these headers need to be painted or coated after installation?

Stainless steel won't rust bare, so paint is optional. If you want a darker finish or additional heat protection, you can apply high-temp coating — but it's not required for durability.

Will I need new gaskets or bolts to install these?

New header gaskets are strongly recommended during install. Hardware specifics aren't confirmed — verify your bolt pattern against your engine manual before ordering fasteners separately.

Do I need to modify the exhaust system downstream?

These mount at factory points, but you'll want to confirm your current downpipe and y-pipe align with the header outlet. Measure twice before committing to bolt-down.