The Fabtech 6 Inch 4-Link System Box 1 is a primary component for upgrading to a 4-link suspension on Ford F-250 and F-350 Super Duty trucks 2017 and newer. This box typically contains the main links or mounting brackets for the 4-link conversion, offering superior axle control and articulation compared to factory setups. Fabtech is renowned for producing high-performance suspension systems that significantly improve off-road capability and on-road comfort. This is one of several boxes required for a complete 4-link installation.







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