Yes..I have them on my dually! I've had them on 2 of my 3 duallies and would prefer not to tow heavy without them again. My pin weight is around 3100 pounds, well within the F350 DRW capabilities, but it smooths out the ride especially on badly maintained interstates. Plus I keep the truck perfectly level with them. I also have an onboard Viair air system that enables me to adjust on the fly. They are well worth it in my opinion.
2012 Sandpiper 365SAQ weighing @ 15k, Onan, 2nd air, slide toppers, TST
2013 F350 6.7L Lariat 4x4 CC DRW,Viair 1007, Ride-Rites, Edge CTS, B&W
2001 Chevy 3500CC DRW 4x4, 8.1L, 4.10 gears w/ Detroit TrueTrac
2001 Ford Excursion Limited 4x4 7.3L,V/B Spring Mod, ProComps, Hellwig Swaybar, & other 'Necessities'