Description Pre-Assembled Factory Direct Replacement Front Coilover - No Additional Parts Required. Sold in Pairs. Adjustable Threaded Spring Perch to Accommodate Increased Loads and Maximum Clearance. ERO Off-Road Race Spring Equipped and Compatible. Anodized 6061-T6 Billet Aluminum Mounts 46mm Piston Monotube Design with Nitrogen Filled Variable Force Valving. Individually Dyno Tested for Matched Performance and Reliability. Heavy Duty Bushing System also Cycle Tested. Engineered Tested and Manufactured by Eibach in the U.S.A. Limited Lifetime Warranty Fitment: -2021 to 2025 FORD F-150 -Super Crew 3.5L V6 EcoBoost 4WD | Excludes Max Tow Package Front Lift: +0.5-3.0"