1. Determine the frame type
2. Determine the diameter of your axle (leaf springs) Determine specific GVW rating of your trailer suspension (torsion axle)
3. Based on the axle diameter/GVW rating from step 2, locate the correct retrofit kit from the corresponding chart below
4. Determine the location of the upper mounting. Measure the distance between the upper and lower mountings.Based on the centerline dimension at the vehicle static height. Dimension should be taken with trailer on level surface.
5. Using the measurement from step 4, select the appropriate Magnum RV shock absorber from the third chart below.