The ICON Vehicle Dynamics 2023 F-250 and F-350 Super Duty 2.5" coil springs are designed for drivers demanding the ultimate in performance and ride quality, while allowing for increased wheel travel (when used with ICON shocks) and the fitment of larger tires. The ICON Ford Super Duty coil springs provide 2.5" of lift height and feature a dual rate design optimized for use with trucks equipped with gasoline engines. The dual rate design allows for a softer initial rate for superb on-road comfort and a firmer secondary rate that increases during compression for excellent bottoming resistance and off-road performance. Caster correction cams are also included to ensure proper caster angle with the new, taller ride height. Like all ICON coil springs, they feature a lifetime guarantee against sagging/breakage to produce confidence in knowing that you have the best suspension products available for the 2023 Super Duty.. Beyond the added ground clearance, the dual rate design of ICON springs provides a softer initial rate for superb on-road comfort and a firmer secondary rate that delivers excellent bottoming resistance and superior off-road performance.. TECH NOTE: Brake line kit (Part # 61111) is optional for end users who do not want to bend the factory steel lines or are looking for a braided stainless upgrade (not necessary for complete install). APPLICATION NOTE #30: An adjustable track bar may be needed to realign the axle from left to right, or to add additional atrength. Recommended Aftermarket Tires: 35" x 12.50" (Larger tires may fit but fender trimming and modifications will be required.). APPLICATION NOTE #119: Rare cases require a 2.6 degree alignment cam on one side of vehicle for proper caster split. APPLICATION NOTE #155: Requires recalibration of Advanced Driver Assistance Systems (ADAS) after install. TECH NOTE: ICON track bar bracket part # 64039 is also recommended to correct bump steer geometry. TECH NOTE: Models equipped with Tremor package will have front lift height of 1.5" over stock. Recommended Aftermarket Wheels: ICON Alloys - 18x9" w/ 5.25” Backspace / 6mm Offset. Recommended Aftermarket Wheels: ICON Alloys - 20x9" w/ 5.25” Backspace / 6mm Offset. Recommended Aftermarket Wheels: ICON Alloys - 17x8.5" w/ 5” Backspace / 6mm Offset. Caster cam kit included for ideal caster angles with ride height increase. Dual-stage, semi-gloss powder coat offers excellent corrosion resistance. Dual rate coil springs improve on and off-road ride quality over stock. APPLICATION NOTE #156: Springs are rated for gasoline engines only. 23 FORD F-250/F-350 FRONT 2.5” GAS DUAL RATE SPRING KIT W/ CAMS. APPLICATION NOTE #157: Lift heights based on 4WD crew cab gas. ICON 23 Ford F250/350 Front 2.5in. Gas Dual Rate Spring Kit. TECH NOTE: Not compatible with F-450 or F-550. 100% bolt-on system makes for an easy install. Lifetime warranty against sagging/breakage. APPLICATION NOTE #1: Only fits 4WD models. Factory Wheels & Tires Fitment: Yes. TECH NOTE: Will not fit 2024 models. 2.5" lift height. COIL SPRING KIT. Coil Spring Set. 62513

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