Bbs Rs Rz Rc090 Polished Metal Hex Center Cap Set -fits 16 17 18 In Style 5 & 19 on 2040-parts.com

This is a dress up/conversion kit to enhance your Style 5 or 19 wheels.  Fits 16, 17, and 18" style 5 wheels, as well as BBS RZ wheel center caps.   These polished stainless steel hex nuts fit over the existing plastic hex and fit any emblem with a 70.6mm diameter.  The stock BMW Roundels fit perfectly, as well as the BBS "3-D" emblems (Silver, Gold, or Red), as long as you grind the mounting tabs from the rear of the chips.  

These are used hex nuts removed from another type of center cap that fit PERFECTLY over the stock plastic hex with a nice compression fit.  Its actually quite amazing that something like this exists and fits so perfectly.  This means they fit tightly over the plastic hex; they are not sloppy.   AND the slightly flared base of the cap mates flush with your existing cap so there is no gap.   To be sure, I would use some glue to make sure they don't vibrate off (epoxy or silicone).  Attach your emblem of choice and your Style 5s will be different than the others.  

All for 4 hex nuts are in good condition.  I polished them up so they look as close to new as possible.  They do have minor scratches here and there, as would be expected for 10-20 year old parts.  The photos show the 1st set I sold.  I sold 3 more sets within 2 weeks.  The next 4 sets are exactly the same and have no flaws or damage other than an occasional fine scratch.