Heard back from the dealer. They recommend a new cat (kind of assumed that, but wanted confirmation). That along with OEM O2 sensors was over $4k (I installed new ones a month ago). Told them no. So, now I am left with a cat replacement.
The guy that did the clutch and timing belt did remove the cat to get to the water pump last July, and it has had only like 4k miles on it since (he used heat to remove). Is it worth trying to do myself? I found the one below and with current 20% off it's around $475. Anyone had experience with them? The Magnaflow cats are an option for just a bit more, but not sure if they are in stock.
https://www.hottexhaust.com/2010-2012-subaru-legacy-gt-front-catalytic-converter-bolt-on-premium-grade/?srsltid=AfmBOooSdSEar89Mi1eZ8I_YpxSSuXhATpJ0_1ZupeqYRTbTRCoorZflgfs
https://www.hottexhaust.com/magnaflow-21-276-subaru-legacy-2-5-turbo-front-direct-fit-oem-grade-catalytic-converter-federal-exc-ca/?gad_source=1&gclid=CjwKCAiAuNGuBhAkEiwAGId4atnEpKtKvtifnMq9lOr3i-Xi-nl0-pQ3RbNJ86iwl9s8cfQ36DunMhoC9KEQAvD_BwE