5 star "Ponys" are 16" rims. They came on 91-93 mustangs.. mostly GTs. I think they are 16x7s. A new set will cost you $500. Used ones hold their value pretty well. I was going to get ponys but ended up getting weld draglites.. I'm happy with my decision.. good luck
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Rick
My 89lx(updated 2/21/2001)
My 97 Cobra