You may be able to combine a torsion lift kit and larger tires and wheels to get you close to the 4" lift that you are looking for. Currently there is not a torsion lift kit that will raise your 2011 Forest River Rockwood 8244S that much.
I've had a bit of a hard time figuring out exactly what axles are under your Rockwood. I do know that they are 3,500lb axles which narrows down the possibilities. You may have a Dexter #10 Torflex. You can determine if you have this by measuring the... view full answer...