i'd go with high temp flat black. they have special spray paint for engines, people use it to paint everything from engine blocks to brake calipers and it can withstand the high temp in your engine bay.
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TR happily married crew-member #2

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Originally Posted by
Troux
This is the internet. You're just supposed to talk up whatever you do know as if you're a salesman for it. i.e. I drive a Supra and a Corolla therefore 2JZ is the greatest and so is the 4A and I don't care about anything else because it's all crap since I don't have it. I also have a stack of $20 bills in front of me, therefore 20>50 and 20>100 and 20>1000. $20 bill FTW.