4-inch Suspension Lift K Suspension Lift Kit

The Rough Country 4-inch Suspension Lift Kit (model 599S) is a complete bolt-on lift system engineered for Ford full-size trucks from 2009–2010. This kit delivers a true 4-inch lift height using factory-style brackets, heavy-duty bushings, upgraded crossmembers, and a matched set of performance shocks designed to maintain ride quality and handling stability even with the increased suspension travel. At 224 lbs, the system is engineered as an integrated package where every component works together to distribute loads evenly across the frame and suspension geometry.

The kit includes all necessary hardware, spacers, and preassembled shock absorbers, which means installation focuses on bolt-on modifications rather than cutting, welding, or custom fabrication. The included shocks are valved and tuned specifically for the lift height and load characteristics of the 2009–2010 Ford platform, preventing the common issues that arise from mismatched suspension components—such as poor ride compliance over rough terrain, excessive body roll during cornering, or accelerated wear on steering and driveline components. Upgrading the crossmembers ensures the frame geometry remains correct throughout the suspension's full range of motion, maintaining steering response and axle alignment.

This suspension lift is the choice for truck owners who prioritize both increased ground clearance and maintained drivability. Whether running this system for off-road recovery work, overlanding, or simply gaining the functional height advantage for payload hauling and visibility, the complete component package eliminates the guesswork of sourcing compatible parts. The 4-inch lift is sized to deliver noticeable capability gains without compromising frame-to-body clearance, driveline angles, or the truck's integrated stability control systems when properly installed.