I believe they were factory rims for 2001 camaro ss's. I have moved forward with my exhaust modification. I have bought a pair of Pypes rectangle exhaust tips (2.5") and am going with a flowmaster series muffler. Hopefully I will have it installed by the end of the week. Just waiting on the delivery of the tips before taking it to the mechanic. After I get it installed, I will post some pics or try to at least showing the completed process.