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The Superlift rear component box for 1973–1991 GM K‑series pickup 4WD is specified as an 8-inch lift rear spring kit and includes the rear spring components required for that lift. It’s offered as a packaged rear assembly to provide the application‑specific parts needed when building an 8-inch lift on compatible K‑series trucks.
Superlift 73-91 GM K Series Pickup 4WD 8in Lift Kit Component Box - Rear Spring Kit
