Originally posted by Dubs
I can't get a cat from an EX?
You could, but I personally wouldn't buy a used cat. That's just buying used spark plugs.
Originally posted by Dubs
**edit** What I'm asking is, how can I convert my Y7 exhaust system to a Y8 exhaust system?
Install y8 header, y8 style cat. Rewire and extend engine harness for 4-wire HO2 sensor.
You will also need to modify your current exhaust system as undoubtedly it'll be too long.