After going through 2 exhaust manifolds on my YJ I decided it was time to put an end to this nonsense.
Im now on my 3rd and its outlived the others by a few years.
Although I had the little 2.5 L.O.
The engine has a lot of torque in 4-low and moves around a lot under conditions like rockcrawling and such. Put a go-pro in there and see for yourself.
First put a flex-joint just before the skidplate. Make sure its a heavy duty unit from an exhaust shop and not a auto-zoo POS cause those will burn out in no time. Jap cars have had these for awhile.
In the pic I have a slip joint at the front w/ U-bolt so I can remove the front section If need be.
Second you'll need to hold up that front section or it will put stress back at the manifold again (we don't want that) . Using a u-bolt and this unused mount on the engine . This holds the front section great . Like it was put there on purpose. Hmmmm.
The flex-pipe ran about $100 including install but was worth it considering its held up for 5 yrs w/ abuse.
Last but not least. Cut off any tailpie that is sticking out the back. Cut it to where if a rock hits back there the shackle or receiver will take the hit and not the tailpipe.
I see this a lot when im off-road . Some guy just got done on an obstacle and his tailpipe is dragging the ground or has pushed it forward and ruined the whole exhaust system .
Hope this helps all in the off-road world .