Yes, SumoSprings and Roadmaster rear sway bars can easily be used at the same time on an RV like your 2017 Winnebago Sunova 22,000 lb chassis and you'd have a great ride quality. The Roadmaster Sway Bar part # RM-1139-149 is a confirmed fit for your RV and then for SumoSprings you'd want the # SSR-187-54-1 which is also a confirmed fit. view full answer...