Aftermarket cats won't pass CO emissions. Not the first time, let alone 3 years later.
You want a GESi cat fabbed onto your downpipe if you want a no hassles exhaust. Aftermarket cat that comes on DP (COBB for instance) costs about $75. A GESi cat costs about $430, but it actually has the precious metals in it to be a real cat and pass emissions. A GESi cat on your car makes it 100% EPA and Street legal and there is little to no loss in HP.
Contact 5250 Performance in Longmont.
2005 Outback FMT