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TargaC5: I think he means the intake airbridge, not the intake manifold.:smash: I would think that high temp paint is not necessary for the plastic airbridge.
Please post pictures of your fuel rail covers, would love to see them...
You should be alright with normal paint. Some hot rodders actually use the same paint on their engine block as they do on the body. I can't see how it can stand the heat though. Your intake should be fine, like you said since it is plastic, it runs a lot cooler.