Description
The FOX® 883-26-100 Performance Elite Series 2.5 Reservoir Shock is a rear-position, piggyback-reservoir shock pair with a Dual Speed Compression (DSC) adjuster, engineered for the Ford Super Duty F-250 (2017-2026, all 4WD trims) and F-350 (2017-2026 on XL, XLT, Lariat, King Ranch, and Platinum; 2018-2024 on Limited) running 4-6 inches of rear lift.
IMPORTANT: This kit (883-26-100) is designed specifically for the 4-6″ rear lift height range. FOX offers a separate rear kit, 883-26-096, for the 0-1.5″ rear lift height range — do not substitute between these SKUs. This is a rear-only kit; a front kit rated for the same 4-6″ lift range is required to complete the application and is sold separately. This kit is sold as a pair (two shocks).
The FOX® Performance Elite Series 2.5 Reservoir Shock delivers an upgraded, bolt-on suspension solution for the Ford Super Duty, built to improve off-road capability and towing stability while keeping the truck comfortable and controlled on the daily commute.
At the core of the Performance Elite Series is a 2.5″ impact-extruded and CNC-machined 6061-T6 hard-anodized aluminum shock body designed to resist rust over time, paired with an external reservoir system that increases oil and nitrogen capacity for fast heat dissipation. Black-anodized, CNC-machined 6061-T6 billet aluminum components and a race-developed high-flow piston design are performance-tuned for the Ford Super Duty’s specific application.
The reservoir features a Dual Speed Compression (DSC) adjuster, giving the driver independent control over low-speed and high-speed compression damping to fine-tune the ride for pavement, towing, or trail use. Application-specific valving is applied at the factory to match the Ford Super Duty’s weight and suspension geometry at this lift height.
Construction includes a 7/8″ hard chrome-plated, heat-treated alloy steel shaft, PTFE-lined heat-treated alloy steel spherical bearings, and a redundant sealing pack system (main seal, wiper seal, scraper seal) for long-term durability. FOX® 2.5 Performance Series products purchased after March 30, 2025 carry FOX’s Limited Lifetime Warranty; products purchased prior to that date are covered under FOX’s standard Limited One (1) Year suspension warranty. Full warranty terms are available from FOX Factory, Inc.
- Fitment: Ford Super Duty rear position, 4-6″ lift height, DSC-adjustable — F-250 all 4WD trims 2017-2026; F-350 XL/XLT/Lariat/King Ranch/Platinum 2017-2026, Limited 2018-2024 only
- 2.5″ impact-extruded and CNC-machined 6061-T6 hard-anodized aluminum body resists rust over time
- External reservoir system with Dual Speed Compression (DSC) adjuster dissipates heat fast
- Black-anodized, CNC-machined 6061-T6 billet aluminum components
- 7/8″ hard chrome-plated, heat-treated alloy steel shaft
- Race-developed high-flow piston design
- PTFE-lined, heat-treated, alloy steel spherical bearings
- Redundant sealing pack system: main seal, wiper seal, scraper seal
- FOX Limited Lifetime Warranty (2.5 Performance Series purchased after 3/30/2025); FOX Limited One (1) Year Warranty otherwise
- Sold as a pair
| Part Number | 883-26-100 |
| Brand | FOX® |
| Series | Performance Elite |
| Position | Rear |
| Lift Height | 4-6″ |
| Fitment Years | F-250: 2017-2026 all 4WD trims. F-350: 2017-2026 XL/XLT/Lariat/King Ranch/Platinum, 2018-2024 Limited only |
| Travel | 13.58″ |
| Body | 2.5″ impact-extruded and CNC-machined 6061-T6 hard-anodized aluminum body, resists rust over time |
| Body Plating | Hard-anodized for a durable finish |
| Components | Black-anodized, CNC-machined 6061-T6 billet aluminum |
| Shaft | 7/8″ hard chrome-plated, heat-treated alloy steel |
| Piston | Race-developed high-flow piston design |
| Valving | Application-specific valving |
| Seals | Redundant sealing pack system: main seal, wiper seal, scraper seal |
| Bearings | PTFE-lined, heat-treated, alloy steel spherical |
| Extended Length | 34.93″ |
| Compressed Length | 21.35″ |
| Top Mount | Eyelet |
| Bottom Mount | Eyelet |
| What’s Included | Two (2) FOX 883-26-100 rear shocks (pair) |
| Warranty | FOX Limited Lifetime Warranty (2.5 Performance Series purchased after 3/30/2025); FOX Limited One (1) Year Warranty otherwise |
This kit fits the Ford Super Duty rear axle at 4-6″ of lift with a Dual Speed Compression adjuster. F-250 Super Duty coverage is 2017-2026 across all 4WD trims. F-350 Super Duty coverage is 2017-2026 on XL, XLT, Lariat, King Ranch, and Platinum trims; Limited trim coverage runs 2018-2024 only, with no 2025 or 2026 Limited fitment listed.
This SKU (883-26-100) is built specifically for 4-6″ of rear lift and is not interchangeable with FOX 883-26-096, which is built for 0-1.5″ of rear lift. Confirm your truck’s actual rear lift height before ordering, and pair this kit with a front kit rated for the same 4-6″ lift range.