Started to notice exhaust fumes inside the cabin at start up and louder than normal engine noise. Subaru dealer said catalytic converter was cracked and need to be replaced. Part alone was $1,500! Took it to an independent shop that specializes in Subarus for a 2nd opinion. They said it was definitely cracked and need to be replaced. Asked about welding new parts on but they said it would likely just be putting on a band-aid and waste of money. They were able to get an after-market catalytic converter (came with 5 yr warranty). All-in with labor was $1,200. He said the OEM part + installation would have been $2k. Posting this alternative to OEM option incase anyone finds themselves in the same situation.