Do I need to remove the factory catalytic converter to install this?

No — this catback bolts directly to your factory cat. The connection point is designed for direct fitment, so you keep your existing converter in place.

Will this require welding or cutting any part of my stock exhaust?

No welding or cutting required. This is a bolt-on system. You disconnect the factory catback from the cat and connect this one in its place.

What do I need to do before installing this exhaust?

Raise the vehicle safely, support it on jack stands, disconnect the factory catback, and bolt the new system in place. Let it cool fully before starting — the stainless steel will get hot during operation.