[Thundrr5]

Any chance that changing the o2 sensor will fix this?

I'd say probably no. I had the same issue, and I had to break down and get headers. It was cheaper to get headers than to get new catted manifolds.

Everyone suggested doing RRE button can't get them. I have till July to fix it.

If you can't find RRE, maybe look for OBX. They make a set for the V6.