This is an inexpensive replacement cap. These caps are designed to replace your factory units if they have faded or cracked over the years. There are no metal inserts. We suggest that you use your old steel inserts & install into the new caps. This gives a lower likely hood of flying off on hard acceleration & tight cornering.
Price is $20.00 each, or $65.00 a set
If you do not have original caps with a metal retainer we do sell a GM restoration cap that has a metal retainer. They are $35.00 each or $129.95 a set.
They are located HERE
If you have an original GNX & need a factory GM center cap with a metal retainer they are located HERE