The best suspension modification you can make for an RV is a rear sway and for your 2018 Nexus RV that is on a 2017 2016 TerraStar International chassis you would want the rear sway bar part # RM-1179-112.
Next in line would be going with an aftermarket front sway bar. For that you would want the part # RM-1179-124 which is also a confirmed fit. view full answer...