I have changed mine. You need to remove the back headrests first. There is a plastic plug on the rear side of each headrest, pry that off and then you can unscrew the headrest. You then need to carefully pry the plastic covers apart without breaking the little plastic clips. Once they are pryed apart you can remove the grey covers and replace with the chrome ones. It is relatively easy. Take Care

 

What is a roll hoop?

 

these things:

(image found via google image search, I added arrows)

 

Those arrows were standard on my MCSC, but I cut them off. They clashed with the black exterior...

 

Would you let me know the parts # and price of chrome roll hoops for 2006 MINI Convertible? Also I'd like to know where I can purchase them from.
Thanks!