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QA1’s rear four-link single-adjustable suspension system for 1968–1972 GM X-body vehicles replaces factory rear suspension with a coilover-based four-link setup. It accommodates wider wheels and tires up to 11 inches or 315mm, offers adjustable ride height (+2 to -3 inches), and improves handling with bolt-in components requiring minimal welding. QA1 backs its shocks with a lifetime warranty and U.S. manufacture.
QA1 68-72 GM X-Body Rear Four Link Single Adjustable Suspension System
