Originally Posted by jannnda
The shocks. What makes Bilstein different than any other shock?
There are at least 6 different manufactures of shock absorbers for the different iterations of the F-53 chassis. The valving is different in the different shocks as is the valve actuation, even the shock diameter and construction can vary (single chamber, dual chamber, remote reservoir). There are different calibrations for jounce and rebound controlled by inertia valves or pressure valves or even a combination of the two.
See SDtrucksprings, Rockauto or Summitracing for more info.