its just an open pipe, you wont see any cooling from that. the speeds the air is traveling is to fast for it to shed any heat. There is a guy on the 3S forums who had some problems with overheating his fuel supply and used a similar type of tube for the fuel line (obviously smaller) and it had to run almost the entire length of the car to see the couple of degree temp drop that he needed on both feed lines. and this was under the car where there would be plenty of airflow across the fins.