I cant really say too much, all I can do is warn you about the costs. Maybe start a thread in the general section asking people who have bought intercoolers if they got charged by customs.
Smaller things like filters, turbos, turbo timers, and stuff like that will 99% of the time not get hit with charges, usually only the larger thinks.
I am only telling you this, cause I have to pay customs on all the ones I bring in.