I wasn't happy with the CHF and hoped to get better sway control.
I went with the Helwig on both ends as they were the cheaper at the time for the same size diameter bar. Front install was simple, rear lot more work.
Getting the rear U-bolts off and re-tightened to the 400 (?) pounds took some effort. Four foot of pipe on the flex bar worked good enough for me.
Then taking off the bolts on the frame for the downlinks was a tough one too. Had to raise the frame up using the jacks and blocking to get a socket on the bolts with a two foot pipe on the flex bar, or remove wheels. Once I got them broke loose was able to get the ratchet and get about two clicks at a time.
If you do add the larger bars do the rear first then test drive. You may decide not to do the fronts.
In my stupidity I did the fronts first, then found out do the rear first. That is where the weight is.
SDTrucksprings.com had the best prices at the time and they have good customer service.