If we're voting, I say stick a wrench on it and if it's loose snug it up. If it's not loose, and there's no evidence of a leak, leave it be.
To freshen a crusty exhaust spray with wd40 and scrub length wise with a scotch Brite pad. Wipe up excess, and repeat every week or so. Keep this up untill you give up and buy a stainless header.
Last edited by Jello; 07-20-2019 at 07:55 PM.