My pop has a 2003 Matrix XRS with about 120K on the clock. Car runs fine, but according to the place that failed the inspection it is showing code P0420. When the dealer ran the test, they said it needs a new catalytic convereter. The car failed emissions (I believe the link up with the computer here in NJ...not sure though). Here is the kicker, we are getting rid of the car in a couple months, so I was thinking of getting a universal magnaflow cat and welding it in place. Anybody ever use a universal on an XRS? Any other suggestions? I'm going to do some more digging. In the meantime, I'm open to all suggestions.