We used to be an American Star dealer several years ago. We had nothing but problems getting them to warranty thier stuff for our customers. They never told us they wouldn't warranty a part. What they did was say they didn't receive that part we sent back, tell use there was a problem with thier powdercoater or say it was already shipped when it hadn't been.
If you'll all remember every retailer in dirt wheels used to sell thier stuff and now no one does. There is probably a good reason for it.
If you ask my opinion i'd have to say avoid American Star!
Shane