The ICON Vehicle Dynamics 2020-2022 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 2020-2022 Ford F-250 & F-350 Super Duty.Additional Attributes:GTIN:00840103410999Finish:PowdercoatedSpring Material:SteelMaximum Lift Height:4.5Spring Color:BlackGrade Type:PerformanceFront Spring Seat Included:NoFront Spring Rate Type:Progressive Dual RateAAP_UDA_12:EAAAP_UDA_22:1AAP_UDA_4:55Add-On Part:61110 17-22 FSD FRONT 4.5 & 7 EXTENDED SS BRAKE LINE KITCalifornia Proposition 65:WARNING: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.OEM Wheels & Tires Fitment:YesRecommended Aftermarket Tires:37 x 12.50 (Larger Tires May Fit but Fender Trimming and Modifications will be Required)Recommended Aftermarket Wheels:ICON Alloys 178.5 w/ 5 Backspace / 6mm OffsetExtended Information:Emissions :Emissions Compliance ExemptLife Cycle Status:Available To OrderPackaging:Quantity of Each:1.0Package UOM:EADimension:27.0000 x 12.0000 x 6.0000 inchesWeight:75.0000 PGPDF:I64011_REVA