I bought these Porsche crest units for my Champion RG5s and they are perfect. They fit amazing well, are shiny just like the paint on my wheels and have stayed on for a few months now, I was worried they would fly off originally.

If your looking for some replacements or something for your wheels, at $34 for the set plus shipping they are super high quality.

http://www.ebay.com/itm/271172941762...ht_2044wt_1324

For when the ebay link go dead:
ebay keywords were: BC Porsche gloss Black Color Crest Center cap caps Boxster Cayman 911 996 997
seller "yokuimport"

 

Looking good, but the crest needs to be pointed towards the valve stem to be proper

 

Haha. You know, that was the first wheel I changed and the rest I did do that once I noticed it. Not because I knew that only because I'm borderline OCD. Know what, now I'm gonna have to change that one, thanks a lot.