I have a 2017 RCSB that I just did a 4/6 drop on back in October. I ended up using the MaxTrax 4/6 drop with spindles, shocks, and flip kit. I was going to go with BellTech, but they were backordered and kept pushing back the ship date. The guy said he sells more MaxTrax lowering kits than anything and they're made in the USA. I went with it and couldn't be happier. The ride is great and I've had no rubbing or bottoming out issues. I would suggest some helper bags if you plan to load up the bed or haul a trailer often. I also did solid front sway bar end links which seemed to help too.