I've never seen those wheels before. What do the stampings on the back say?

I figured out my Grand Prix wheels by those. They were MB brand. Out of production. While washing them I came across a bunch of cast markings on the back side of the wheels. All sorts of juicy info back there. I was able to find the model.

If you can get the model and google it you should be able to find them pretty quickly.

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Tyler/T-Unit