uhh.. yeah what he said lol...
since the crucial guy had a comprehensive answer there, I would only add that while the air from the scoop is cooling the intercooler core (only while moving btw) the bellows keep the air blowing straight through the middle. The radiant heat coming from the dp is only inches away and there isn't much stopping it from heating the intercooler from the outside in.
I haven't looked, but I don't have any offhand proof that the coating has any benefit on top of what he mentioned. But for things like exhaust that are a pretty important piece of the engine performance as a whole, I don't mind spending that little bit extra for what are essentially the proven tangible benefits of coating outlined by senor crucial.
oh and my catless 04 wrx just passed emissions which makes me happy. sti here I come
