Thanks for correcting me on the 'special paint' J333EVO. It's unlikely that the ebay manifold is done with the proper ceramic coating given the price that Ashley is doing it for. If I was going for the manifold I would be looking for the proper ceramic coating because it would be likely that I would be running an open cone filter - the less heat in there the better. Saw a scooby recently on a 'car for sale' site and it was full of ceramic exhaust tape - looked like it had been in the warzone !
The tape/ceramic coating isn't really to keep heat out of the intake, it's to keep the heat in the exhaust to make it more efficient.