I replaced the OEM front and rear sway bars on our 2002 E450 chassis with Hellwig and am unconditionally glad that I did. Handling on the road improved unexpectedly well. And SO DID stability on the campsite!!!
Also added a Blue Ox Tiger Trak rear track bar. It contributes, but the Hellwig sway bars were the big ticket payoff.
Hellwig is a no-drill installation and it isn't necessary to lift the coach. Track Bar is no-drill also, but it helped to raise the rear just to get some working room.
Hellwig's bar specs are same as Roadmaster's, just far less expensive.