Superior Ride Quality. Give your first-generation Ford Super Duty an impressive upgrade and incredible ride quality with Rough Country's 4-Link Coilover Conversion Lift Kit! This must-have kit is the pinnacle of suspension upgrades. Providing ride height adjustability, increased dampening, and killer good looks. You're sure to set yourself apart from the pack. This innovative kit allows you to replace your factory arms with a 4-Link setup, using Rough Country's durable, fixed upper arms and adjustable lower control arms. A set of radius arm drop brackets maintain proper geometry and allow for proper caster setting, which is crucial to maintaining factory handling.\ Durable Components. Rough Country's 6" 4-Link Coilover Conversion Lift Kit features top-mounted reservoir brackets and coil-over mounts constructed from 1/4-inch steel. Utilizing this conversion kit you're removing the factory independent coil shock and coil set-up and replacing it with a massive 2.5in piston, nitrogen-charged, 8-stage adjustable Vertex Coilover. Rough Country's Vertex Coilovers feature a monotube design with an external reservoir for increased oil capacity and damping sensitivity. When it comes to investing in a high-end kit, you'll be pleased to find that Rough Country's 2.5in piston design is beefier and offers an impressive 56% greater fluid capacity than the average reservoir shock. Each kit is paired with a monotube shock that provides optimal damping control.\ Installation. Requiring cutting and drilling to install, an estimated timeframe of 6-10 hours is recommended to complete this full installation. This full kit can be installed at home and can be completed efficiently and quickly!\ Limited Lifetime Replacement Warranty. Rough Country's 4-Link Coilover Conversion Lift Kit is backed with a limited lifetime replacement warranty towards manufacturer defects. As such, the product is protected from structural and workmanship damage after the date of purchase. With our industry-leading warranty give yourself peace of mind when using Rough Country's Suspension products!