I have JBA ceramic coated, they are 3 yrs old and still look brand new and made of T304 stainless. The coating isn't rust proofing! If want a quality header that will not look like crap then buy quality. it comes down to the material used and is the leading cost factor and is why Kooks, JBA, bassani are a higher priced header for starters..T304 stainless. Ford racing is a great bang for the buck header and is made from 409 stainless ( the primary stainless used in exhaust making) has a higher carbon content so it will get some surface rust but that is about it. becareful about the word stainless, i just tried ( quickly I will add ) to look up the material used buy mac and bbk and didn't find much so this doesn't suprise me at all, punch in kooks, JBA and Ford racing and the stainless steel they use come right up..go figure.
there are grades of stainless T304 is better than 409, etc, etc, etc. the T304 isn't going to rust and will look brand new, it is harder to bend and work with so it cost more to pump out a part. the coating helps to scaveng and control heat buy keeping it in the header to help this effect and produce power. chrome doesn't belong on a header, it peels and is moslty found on steel headers. Go with what your budget will let you, but don't be surpised when a low cost haeder rusts, and a coated budget header doesn't mean it will not..it will. It all about the steel.