1986-1987 GRAND NATIONAL GM WHEEL - CENTER CAP GM’s wheel centers can easily fall off or get stolen. We stock the original GM wheel centers with the “turbo-six” logo attached to the plastic hub. Like most Grand National items, these are “special order” from a dealer and prices vary widely. It’s a good idea to buy spares, while supplies last. 6653 - 1986-1987 Grand National GM Wheel - Center Cap