Modern MoPar and O2 sensors

The 4.0L in my 2005 Jeep is really picky when it comes to O2 sensors. NTK brand do the best, and were OEM installed. Replaced the upstreams (there are 4) with Bosch a while back and it was quick to throw codes. Also, if you have any sort of exhaust leak at all you can get a downstream sensor lean code. How are the manifold bolts/studs on that 5.7?