I just got a set of Enkei RS6 new and cheap and I am not sure if I should have them installed with rubber or metal stem air valves..

What do you suggest?

 

Pretty much a purely cosmetic choice.

 

Thanks. I wasn't sure if one was better than the other..

 

From what I have understood, for normal driving they are pretty much on par with each other. There may be some circumstances (off-road applications, etc.) for which the metal one might have the edge insofar as durability goes.