The mounting brackets for the height-control adjust valve sandwich the frame rail where the original jounce bumper mounted. These brackets are designed to leave room for typical fifth-wheel mounts against the frame rails. New jounce bumpers are located inside the air springs.
The air spring and lower mount brackets bolt together. The air spring can then be bolted to the assembly.
The air spring assembly mounts atop the axle with U-bolts. The interlocking bracket that sits atop the factory leaf spring perch maintains the original spring pack height and provides a secure mount for the J-link bracket.
The air fitting on top of the air spring inserts into the upper air spring and height-control adjust valve bracket. There is also an alignment pin (arrow) on the air spring that must be inserted into the bracket: This keeps the spring properly located and precludes rotation.