{"product_id":"fox-performance-series-rear-shock-for-2017-ford-f-250-f-350-super-duty-with-4-6-in-lift-part-number-fox987-24-021","title":"FOX Performance Series Rear Shock for 2017+ Ford F-250\/F-350 Super Duty with 4-6 in. Lift, Part Number FOX987-24-021","description":"FOX Performance Series shocks contain the latest in shock technology to transform the performance of your Truck or SUV. They use our race-proven damping control to provide a comfortable on-road ride and predictable off-road handling in even the toughest conditions.\nApplication specific valving to maximize performance.\nIncrease your vehicle's off-road capability by extending drop-out travel in most applications. Experience on-road comfort with performance-minded shock valving for a connected ride with less vehicle sway. Tuned specifically for your vehicle’s application._x000D__x000D_\n_x000D__x000D_\nConsistent and fade-resistant performance due to high-quality materials: aluminum bodies, race-developed main piston, and a true internal floating piston (IFP) to separate gas and oil._x000D__x000D_\n_x000D__x000D_\nBuilt-to-last, torture-tested and race-proven to give a lifetime of great rides. FOX products are built from aluminum, dissipating heat four times better than conventional materials. All FOX shocks are fully serviceable and resistant to corrosion and harsh environments.\n\u003cul\u003e\n  \u003cli\u003e2.5 in. Impact Extruded 6061-T6 Aluminum Shock Body\u003c\/li\u003e\n  \u003cli\u003e2.5” Impact extruded 6061-T6 aluminum shock body\u003c\/li\u003e\n  \u003cli\u003eHigh-flow velocity-sensitive damping\u003c\/li\u003e\n  \u003cli\u003eType II clear-anodized body plating\u003c\/li\u003e\n  \u003cli\u003eFully rebuildable and re-tunable\u003c\/li\u003e\n  \u003cli\u003eInternal floating piston (IFP)\u003c\/li\u003e\n  \u003cli\u003eHydraulic Top Out (HTO) piston\u003c\/li\u003e\n  \u003cli\u003eInternal Floating Piston [IFP]\u003c\/li\u003e\n  \u003cli\u003eHydraulic Top Out [HTO] Piston\u003c\/li\u003e\n  \u003cli\u003eApplication specific tune\u003c\/li\u003e\n  \u003cli\u003e5\/8 in. Hard Chrome Shaft\u003c\/li\u003e\n  \u003cli\u003e5\/8” hard chrome shaft\u003c\/li\u003e\n  \u003cli\u003eCorrosion resistant\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe FOX Performance Series FOX987-24-021 rear shock is designed for 2017 and newer Ford F-250 and F-350 Super Duty trucks equipped with a 4-6 inch lift. This smooth-body shock uses race-proven damping technology to improve suspension control, reduce vehicle sway, and provide a more connected driving experience on and off the road. Application-specific valving is tuned to support predictable handling while maintaining a comfortable ride during daily driving and demanding off-road use.\u003c\/p\u003e\u003cp\u003eA 2.5-inch impact-extruded 6061-T6 aluminum body helps dissipate heat efficiently for consistent, fade-resistant performance. The internal floating piston separates gas from oil to help prevent aeration, while the hydraulic top-out piston improves control through the suspension’s extended travel range. A high-flow, velocity-sensitive damping design further enhances response across changing terrain and driving conditions.\u003c\/p\u003e\u003cp\u003eThe FOX987-24-021 features a Type II clear-anodized finish for corrosion resistance, a hard-chrome shaft for long-term durability, and construction intended to withstand harsh environments. The shock is fully serviceable, rebuildable, and re-tunable, allowing it to be maintained and adjusted over its service life. It is engineered for rear suspension applications and sold as one shock absorber. Fitment includes select 2017 Ford F-250 Super Duty and F-350 Super Duty models and 2017+ applications using a compatible 4-6 inch lift system. Verify vehicle configuration, suspension lift, and installation requirements before ordering.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOne FOX Performance Series rear smooth-body shock\u003c\/li\u003e\n\u003cli\u003eInternal floating piston and hydraulic top-out piston assembly\u003c\/li\u003e\n\u003cli\u003eApplication-specific valving for compatible lifted Ford Super Duty applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eApplication-specific valving: Tuned for 2017+ Ford F-250 and F-350 Super Duty trucks with a compatible 4-6 inch lift to balance ride comfort, control, and off-road performance.\u003c\/li\u003e\n\u003cli\u003eAluminum shock body: The 2.5-inch impact-extruded 6061-T6 aluminum body dissipates heat efficiently and resists corrosion in demanding environments.\u003c\/li\u003e\n\u003cli\u003eInternal floating piston: Separates gas and oil to help reduce aeration and maintain consistent damping performance.\u003c\/li\u003e\n\u003cli\u003eRebuildable construction: Fully serviceable, rebuildable, and re-tunable design supports long-term maintenance and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitments:\u003cbr\u003e\n2017 Ford F-250 Super Duty King Ranch\u003cbr\u003e\n2017 Ford F-250 Super Duty Lariat\u003cbr\u003e\n2017 Ford F-250 Super Duty Platinum\u003cbr\u003e\n2017 Ford F-250 Super Duty XL\u003cbr\u003e\n2017 Ford F-250 Super Duty XLT\u003cbr\u003e\n2017 Ford F-350 Super Duty King Ranch\u003cbr\u003e\n2017 Ford F-350 Super Duty Lariat\u003cbr\u003e\n2017 Ford F-350 Super Duty Platinum\u003cbr\u003e\n2017 Ford F-350 Super Duty XL\u003cbr\u003e\n2017 Ford F-350 Super Duty XLT\u003cbr\u003e\n2018 Ford F-250 Super Duty King Ranch\u003cbr\u003e\n2018 Ford F-250 Super Duty Lariat\u003cbr\u003e\n2018 Ford F-250 Super Duty Limited\u003cbr\u003e\n2018 Ford F-250 Super Duty Platinum\u003cbr\u003e\n2018 Ford F-250 Super Duty XL\u003cbr\u003e\n2018 Ford F-250 Super Duty XLT\u003cbr\u003e\n2018 Ford F-350 Super Duty King Ranch\u003cbr\u003e\n2018 Ford F-350 Super Duty Lariat\u003cbr\u003e\n2018 Ford F-350 Super Duty Limited\u003cbr\u003e\n2018 Ford F-350 Super Duty Platinum\u003cbr\u003e\n2018 Ford F-350 Super Duty XL\u003cbr\u003e\n2018 Ford F-350 Super Duty XLT\u003cbr\u003e\n2019 Ford F-250 Super Duty King Ranch\u003cbr\u003e\n2019 Ford F-250 Super Duty Lariat\u003cbr\u003e\n2019 Ford F-250 Super Duty Limited\u003cbr\u003e\n2019 Ford F-250 Super Duty Platinum\u003cbr\u003e\n2019 Ford F-250 Super Duty XL\u003cbr\u003e\n2019 Ford F-250 Super Duty XLT\u003cbr\u003e\n2019 Ford F-350 Super Duty King Ranch\u003cbr\u003e\n2019 Ford F-350 Super Duty Lariat\u003cbr\u003e\n2019 Ford F-350 Super Duty Limited\u003cbr\u003e\n2019 Ford F-350 Super Duty Platinum\u003cbr\u003e\n2019 Ford F-350 Super Duty XL\u003cbr\u003e\n2019 Ford F-350 Super Duty XLT\u003cbr\u003e\n2020 Ford F-250 Super Duty King Ranch\u003cbr\u003e\n2020 Ford F-250 Super Duty Lariat\u003cbr\u003e\n2020 Ford F-250 Super Duty Limited\u003cbr\u003e\n2020 Ford F-250 Super Duty Platinum\u003cbr\u003e\n2020 Ford F-250 Super Duty XL\u003cbr\u003e\n2020 Ford F-250 Super Duty XLT\u003cbr\u003e\n2020 Ford F-350 Super Duty King Ranch\u003cbr\u003e\n2020 Ford F-350 Super Duty Lariat\u003cbr\u003e\n2020 Ford F-350 Super Duty Limited\u003cbr\u003e\n2020 Ford F-350 Super Duty Platinum\u003cbr\u003e\n2020 Ford F-350 Super Duty XL\u003cbr\u003e\n2020 Ford F-350 Super Duty XLT\u003cbr\u003e\n2021 Ford F-250 Super Duty King Ranch\u003cbr\u003e\n2021 Ford F-250 Super Duty Lariat\u003cbr\u003e\n2021 Ford F-250 Super Duty Limited\u003cbr\u003e\n2021 Ford F-250 Super Duty Platinum\u003cbr\u003e\n2021 Ford F-250 Super Duty XL\u003cbr\u003e\n2021 Ford F-250 Super Duty XLT\u003cbr\u003e\n2021 Ford F-350 Super Duty King Ranch\u003cbr\u003e\n2021 Ford F-350 Super Duty 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