Polishing intake runners

[JustJeff]

I'm curious what people think about polishing intakes?

I'm specifically interested in polishing the intake runners on the irons, but also interested about polishing the runners on the LIM and UIM.

I'm in the middle of a rebuild on a JDM S5 13B that is mostly stock. I'm not doing any porting of irons or housings. I had a friend suggest I polish the intake runners on my irons, but to me it seems like the benefits from that would be minimal at best.

I suppose all things being equal polishing wont hurt anything. But I'm all out of those types of bits for my dremel and don't want to spend $40 on bits for little or no gain.