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Originally Posted by Raptor
Allumnum is not a good insulator, rather it is good at transferring heat, exactly the opposite of what you want in IC piping.
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Hence why the cores are made from aluminum. In my mind, you would want aluminum piping from the turbo to the IC to help transfer some of the heat created by the turbo, and SS from the IC to the throttle body to better shield the cooled air from the underhood temps. I suppose to do this properly, intake temps would need to be taken both before and after the core, along with in the engine bay and the intake air at the throttle body. If you have a "cold-air intake" setup on a car, SS piping would also seem to make more sense (although aluminum is far lighter....everything is a trade-off).