I have a one (or two) set of Timbrens for sale.

One set (FR350SDF) fits the following Fords Vehicles:

1970-1993 Ford F350 Cab & Chas 4WD
1970-1987 Ford F350 Cab & Chas 2WD
1989-1998 Ford F350 Cab & Chas 2WD
1999 Ford F350 SD Cab & Chas 4WD
2001-2004 Ford F350 SD Cab & Chas 4WD
1999-2004 Ford F350 SD Cab & Chas 2WD
2005-2011 Ford F350 Super Duty 2WD
2005-2011 Ford F350 Super Duty 4WD, and
2012 Ford Superduty

Timbrens are an engineered rubber springs that aids suspension. When installed, they will keep the truck level when a load is there from a fifth wheel trailer or heavy load in the bed of the truck. When loaded the ride is very good. When there is no extra weight on the rear axle, the Timbrens are not "activated" and the ride is not affected.

Timbrens replace the rubber (usually yellow colored) stop just above the axle on each side. They are easy to install--perhaps 30-40 minutes total time.

To learn more about them, go to Search Results for "caraccesorys.org" or Vehicle Suspension Kits - Timbren Suspension Enhancement Systems
to see how they work and what they claim to do. A new set costs from nearly $300 or more--depending where they are purchased.

Of course, I would take less--perhaps, about half of the new cost (c. $125 obo), plus shipping for one set. If you wanted two sets, the price would not be double--something around $210 obo for both sets would be a good starting point.

Regarding the second set, I can give you dimensions to check for a fit. I did use them on my 2005 dually F350; but they would fit other vehicles as well. They are less tall than the first set described above; but there are extra
"bushing pads" for the second set to help adjust to a good fit.

They would be shipped the original box and the directions and all parts are included.