I've been looking at upgrading our travel trailer to a toy hauler fifth wheel and have also been looking to put a set off air bag's to assist the the rear of the truck when loaded. Now can you get a bracket and bag setup for a 6" lift?
From my understanding of it, and my understanding is limited,
you would want use the inside the frame bags like the Firestone
model #2450. Attached is the install instructions.
With a 6" lift you could use the following product to provide the
needed space for the lift distance:
Air Lift Company - Products - Lock-N-Lift
By the way, I came close to buying the model 2450 bags. But,
the instructions say you have to have the jounce on the block
that can go through the lower bracket. I don't like that because
I don't plan to leave a block with a jounce on it ... or at least
I don't want to have to leave one.
The thing about the model 2452 bags I bought are that they
aren't suppose to work with a 5th wheel hitch setup. I don't
plan on having a 5th wheel setup at this time, so the 2452s
won out for me.
I think the model 2452 bags could be used with a 5th wheel
hitch setup if the user is willing to drill through the outside wheel
well brackets of the hitch setup. I'm not sure on this, though.