you will want aluminum piping for your intercooler it will let the heat escape mucho more betta
This is a common misconception. The intercooler core is where all the magic happens; the charge tubes themselves don't contribute any significant temperature drop. There are two reasons for this:
#1: unlike an intercooler core, charge tubes are not comprised of numerous narrow passages chock full of cooling fins. These internal fins are responsible for 'churning' up the charge air, and they do most of the work of drawing heat out of the charge air. Charge tubes are simply one large passage which is not able to draw much heat out of the air flowing inside it. (You might see a small difference at the boundary area of the pipe, but the majority of the charge air is not in contact with the tube wall and will thus not be affected in any significant way.)
#2: Post-intercooler, your charge temps have been significantly reduced--perhaps within 20 or 30 degrees of ambient if you have a good setup. Well, guess what: your underhood temps are
also 20-30 degrees higher than ambient. Intercooling--in other words, temperature reduction--requires a temperature difference between the charge air and the cooling air. The smaller this difference, the less the effective temperature change you will observe. So even if the tube
could somehow transfer lots of heat from the charge air, it wouldn't have any significant effect underhood since the air outside the tube would be the same temp as the air inside the tube.
