Review on 🔧 Enhanced Performance Belltech 6401 Shackle Kit by Jon Robertson

Belltech 6401 Bracket Kit works great but needs a few supporting mods in my opinion. I installed the kit on a 2018 Sierra RCSB and experienced vibrations in the 20-30 mph range. You will likely need the Belltech 4975 2 Degree Gasket Kit when installing on the RCSB. You will not be using the bolts from the kit, just insert the washers at the front of the leaf spring pack, making sure the large end of the washer is at the back. It immediately released my vibration. The handling has been greatly improved with the addition of shock absorbers. (see photo). Last but not least, you need to adjust the headlights down. On my 2018 truck (4), clockwise turns on each of the headlight adjusters brought the bars back to the standard height. I forgot to mention that removing the six bolts holding the bed to the frame makes lifting much easier than trying to fold the bed in while installing the restraints. UPDATE (12/28/20): 19,000 miles on this setup and everything works perfectly.