4-Inch Component Box with Front Coil Spring Spacers, Super Duty

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4-Inch Component Box with Front Coil Spring Spacers, Super Duty, fitment-checked

A 4 in. box for the 2017-2022 F-250 Super Duty built around front coil spring spacers: the spacer route rather than replacement springs, which keeps the factory spring rate and its ride characteristics while gaining the height.

There are two ways to lift a coil-sprung front end and they behave differently. Replacement springs change the rate along with the height; spacers keep the factory spring and simply mount it higher. This box takes the spacer route, giving 4 in. on the 2017-2022 Ford F-250 Super Duty with the original spring rate intact. It is supplied against part number F1740S3. Boxed weight is 88 lb. Which approach suits depends on whether you want the truck to ride as it did or to carry more.