On my 06 ford 5.4 3 valve has dtc po430 what cat is that?

Question

What cat do I need? Dr side or pass side? Po 430

Answer 1

P0430 Catalyst system efficiency below threshold (Bank 2)

Bank 2 location is at opposite side of Bank1 . Where cylinder 1 is located this is always Bank1, the other side now is bank 2.