I was looking at these today on ebay, and noticed that one dealer said that the older (2002-03) is a direct bolt on or something. Which means that you can get a old oem exhaust and it will fit. BUT will fit on the 2006-07?
Some people on CarDomain said they used the WRX headers and modify them to fit without doing anything to the cat. Is that true?
Also, bolting them on will probably ruin the warranty.