I'm not too surprised about that. It's amazing that the entire front weight of the truck is supported the threads of three bolts on each side. I can easily see those threads stripping out if you jump the truck constantly, especially with a lot more weight than stock. Still, I'm sure it's extremely rare.

As for torsion bars, don't fall for the BS that people like Downey and NWOR try to sell you that you need thicker torsion bars. Those guys are criminals who pray on the lesser informed to make that extra buck.

Stock torsion bars allow for the most flex. If yours are sagging, or need to be replaced, I would put another stock set in. The ony time thicker bars should be used is if you have a lot of weight up front and/or jump the truck and/or run fast on super bumpy roads like pre-running. In other words, any circumstance where the front end is bottoming out when you don't want it too.

In that case, IMO, the Sway-a-way 25mm are the best compromise between a thick torsion bar and decent flex and they are pretty good quality.