The ICON Vehicle Dynamics 2023-2025 Ford F-250 and 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 optimized for use with trucks equipped with diesel 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. 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 2023-2025 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 recommended for end users who are looking for a braided stainless brake line upgrade. Recommended Aftermarket Tires: 37" x 12.50" (Larger tires may fit but fender trimming and modifications will be required.). APPLICATION NOTE #155: Requires recalibration of Advanced Driver Assistance Systems (ADAS) after install. TECH NOTE: Models equipped with Tremor package will have front lift height of 3.5" over stock. Vehicle specific spring rates optimized for use with trucks equipped with diesel engines. 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. Dual-stage, semi-gloss powder coat offers excellent corrosion resistance. Dual rate coil springs improve on and off-road ride quality over stock. ICON 23-24 Ford F250/350 Front 4.5in. Diesel Dual Rate Spring Kit. APPLICATION NOTE #6: Springs are rated for diesel engines only. 23-25 FORD F-250/F-350 FRONT 4.5" DIESEL DUAL RATE SPRING KIT. 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. 4.5" lift height over stock. COIL SPRING KIT. Coil Spring Set. 64012

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