The ICON Vehicle Dynamics 2005-2019 Ford F-250 & F-350 Super Duty 4.5" 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 4.5" of lift height and feature a dual rate design. 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. 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 2005-2019 Ford F-250 & F-350 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 # 61110) is optional on 2017-2019 models 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). Recommended Aftermarket Tires: 37" x 12.50" (Larger tires may fit but fender trimming and modifications will be required.). Recommended Aftermarket Wheels: ICON Alloys - 17x8.5" w/ 5.00” Backspace / 6mm Offset. Recommended Aftermarket Wheels: ICON Alloys - 18x9" w/ 5.25” Backspace / 6mm Offset. Recommended Aftermarket Wheels: ICON Alloys - 20x9" w/ 5.25” Backspace / 6mm Offset. TECH NOTE: Springs rates optimized for use with trucks with diesel engines. Dual-stage, semi-gloss powder coat offers excellent corrosion resistance. Dual rate coil springs improve on and off-road ride quality over stock. 2005-2019 FORD SUPER DUTY FRONT 4.5" LIFT DUAL RATE SPRING KIT. ICON 2005+ Ford F-250/F-350 Front 4.5in Dual Rate Spring Kit. 100% bolt-on system makes for an easy install. Lifetime warranty against sagging/breakage. 05-19 FSD FRONT 4.5" DUAL RATE SPRING KIT. Factory Wheels & Tires Fitment: Yes. FSD FRONT 4.5" DUAL RATE SPRG KIT. FSD 4.5" SPRINGS. 4.5" lift height. COIL SPRING KIT. Coil Spring Set. 64010

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