Actually, anodizing is a proven way to improve cooling for heat sinks (like the ones found in CPU & car radios).

I would assume it does the same to intercooler. But if so, why doesn't any major manufacturer or aftermarker suppliers does that?

I can imagine it added cost for OEM, & maybe less blinky so aftermarket maker don't anodize their cooler & radiator too.

I believe some fridges have cooling pipes that are anodized as well.

 

Really? I'd like to know more about this. I'm going to look into it. Mid-post EDIT: Found this site which I think is pretty cool: http://forum.caswellplating.com/

ETS does apparently:
https://www.evolutionm.net/forums/ex...ercoolers.html

 

A thin coat only. Anything crazy should be for a show car only.