what is the advantage of coated headers besides looks, and performance? is it really worth the extra money?

 

You sort of answered your own question...
Coated headers equal better looks and performance...
Yes, it's worth the money..

 

i think jey hot claims a 100x life expectancy or something huge like that compared to non-coated. Also, they will recoat them for you for free. Cant go wron with that, they have their own brand LTs coming out too that are under 500 coated and shipped.