True dual stock manifolds

ok my car is throwing a po code430(bad cat on the right bank) or bad o2 sensor. should i just replace cat and o2 sensor for like about $200. or should i just get my computer done by madz28z9(delete o2 sensor) and get true duels with my stock manifolds for like $500.

IMO, true duals with stock manifolds would be pointless

You could either fix the problem or get rid of it either by tuning or 02 sims. I wouldn't do true duals though unless it was backed up with headers.