[Piwoslaw]

I found this on a Citoën C4 forum:



It is called an air doser or officially "Butterfly double air metering device". It measures the temperature and pressure of the air coming from the turbo and decides whether it should go through the intercooler or bypass it. I believe it also has a heating element to preheat the air on a cold start.

Here's a picture I found of what it looks like installed:



EDIT: For comparison, here's a picture of my set-up:



I tried U-ing the rubber plumbing to bypass the IC, but it's too tight for that, so no luck Fooling around with the plastic stuff won't be easy since it's stiff and has sensors in it, and very expensive to replace. So I'll keep an eye open for the whole "butterfly etc." set-up. If I find it cheap in a junk yard, then I'll see if I can do a switch-a-roo.