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Re: Needing advice on vapor lock problem.
If the headers are bare metal stainless, they will be just as hot as normal bare metal headers. The ceramic coated ones will run cooler.
Does the exhaust pretty much run next to the frame rail with the fuel tubing? If so, you could be getting heating all along the fuel system and not just in the engine compartment.
What kind of fan setup do you have? Hard to beat a 7 blade OEM fan on a properly working fan clutch for getting good air movement in an engine compartment.
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