Underhood and exhaust coatings

[goinforbroke]

Looking for a good clear coat for underhood parts. Anyone find a particular brand that seems to last (not yellow or peel) better than others? I have used Krylon crystal clear in matte and gloss finish. I like it but, it doesn't seem to last very long. Turns kinda yellow after awhile.

I am also looking for a good header coating. How does the VHT hi temp paint hold up? I really think white headers would look good on my black primered 55 Chevy but, don't know of anything that lasts. Tried coated headers but, they only lasted 2 summers then just rusted like everything else. I have a new set of standard headers and am about to just wrap them and spray them with silicone sealer.
Thanks.