Be in control when maneuvering through turns, during a standing start acceleration, braking, over bumps and berms. Polyurethane allows the leaf spring system to function more effectively. For high performance applications the combination of heavy duty leaf springs and polyurethane spring bushings deliver maximum benefit. You will feel the difference in positive handling and control. 1999, 2000, 2001,2002, 2003, 2004, 2005, 2006, 2007 Ford Super Duty F250, F350, F450
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