I have a set of factory cats that came off my car when it had 700 miles on it. They look brand new with no dents dings or anything. The studs are not ever rusty. I have had them in storage for almost 10 years. I also have the stock manifolds in mint condition with the gaskets. A stock z28 plastic grill insert that is mint with no broken tabs and the bolts are included.

Cats $185 shipped
Manifolds $75
Grill $75

Check my feedback on here and Ebay (nitrobusa)
Any questions please feel free to give me a call. Thanks Chad