Should I re-install the catalytic converter on my 2010 Lancer?

Posted by classcantrap@reddit | askcarguys | View on Reddit | 3 comments

I recently bought a 2010 Lancer off Marketplace and the car runs beautifully except for the persistent check engine light. I ran it through an OBD and got code P0420 repeatedly. My mechanic told me it looks like the previous owner had performed a cat delete. I don't care about the check engine light always being there, but should I buy a new catalytic converter and have it installed? Will not having one negatively impact my car at all?