Honda Civic 2003 Catalytic Converter Replacement

Removal is easy with the right tools, but I doubt you have a hydraulic lift. That’s the main one. Once you get it up on a lift, it’s easy to saw off the exhaust system, then cut the bolts off where the catalytic converter meets the manifold. You still need to buy the right catalytic converter, one that won’t set off a CEL no matter what. Depending on where you live, a CEL will prevent you from renewing your registration. I’d just take it to a muffler shop. OTOH, maybe you have the tools and time to get the job done right.