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There are many RPO codes involved in the car of which don't really mean anything to the actual owner, except maybe to know what they are. Some deal with items such as additional Onstar time limits, wheel center caps and so on. Here is a list from a Corvette site for the 2015 model 2015-corvette-rpo-codes.pdf. They do not have the 2014 listed for some reason.
VRH Value added Assembly Steering Column. As BWF07 said, there are many RPO's that are really only there to direct the assembly line workers to install the ordered parts. Some of them are RPO's that are part of sub-assemblies.
From: In a parallel universe. Currently own 2014 Stingray Coupe.
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Good lick finding the rest of the codes. I have had difficulty finding some of the codes on the C5s that I had - an explanation was just not available so assumed they were strictly for internal use only.