I dont think anodized aluminum affects the thermal properties drastically but i could be wrong.

 

you're probably right

 

When I was in high school, we learned that black objects radiate heat better than silver or polished objects, because with a silver object, the heat actually can be internally reflected by the surface finish. We were also taught that some radiators are painted silver to improve on room aesthetics, which was a big no-no as far as the radiator's function. All of the anodized aluminum that I've seen is black, so I would guess it is an advantage to have an anodized aluminum intercooler. As far as how much difference it makes, I don't know. But making it black seems like a "freebie" to me. No cost to airflow or fitment.

 

bringing this tread back.
Does anyone run the JM fab intercooler? Looks to be the same core as BR. Just wondering if anyone had this on there car and what they could tell me about it.