FOX Performance Elite Series 2.5 Reservoir Rear Shock for 2024–2026 INEOS Grenadier and 2025 Grenadier Quartermaster – Adjustable, Part Number FOX883-26-273

Developed from our off-road race shocks, FOX Performance Elite Series combines race-proven technology with new, cutting-edge features to provide all the adjustability and capacity needed to take on serious off-roading in your Jeep. Application specific valving to maximize performance. Expand your vehicle’s capability with an oversized performance shock that increases strength, provides control and extended wheel travel specifically engineered for your vehicle. The larger aluminum body dissipates heat more efficiently and the increased internal oil volume allows for more control through FOX’s race-developed high-flow pistons._x000D_ _x000D_ Conquer more terrain knowing with our 7/8” hard chromed shock shaft and a redundant seal pack, designed for harsh environments and extreme conditions. Fully serviceable for a lifetime of use._x000D_ _x000D_ Confidence comes with control. FOX Performance Elite shocks offer the widest range of adjustability we offer. Easily adjust your shock for terrain, load and speed to stay in control and confident no matter what path you take.

• Performance Tuned For Vehicle Specific Application
• Aluminum Body Dissipates Heat Faster Than Steel
• Black Anodized CNC Machined Aluminum Components
• External Reservoir System Dissipates Heat Fast

The FOX Performance Elite Series 2.5 Reservoir Rear Shock, Part Number FOX883-26-273, is engineered for the 2024–2026 INEOS Grenadier and 2025 INEOS Grenadier Quartermaster. Developed from FOX off-road race shocks, this adjustable rear shock expands vehicle capability with application-specific valving, increased control, greater strength, and extended wheel travel for demanding trail use.

Its oversized aluminum body dissipates heat more efficiently than steel while the increased internal oil volume supports consistent damping through challenging terrain. The external reservoir further improves heat management, and FOX race-developed high-flow pistons provide controlled suspension performance across changing surfaces, vehicle loads, and driving speeds. Adjustable damping allows drivers to tailor the shock for terrain and conditions.

A 7/8-inch hard-chromed shock shaft and redundant seal pack are designed to withstand harsh environments and extreme off-road conditions. Black anodized CNC-machined aluminum components provide durable performance, while the fully serviceable construction supports long-term maintenance and lifetime use. This rear shock is designed as a direct vehicle-specific performance upgrade for compatible INEOS Grenadier applications.

Key Product Specifications and Technical Data

• Brand: FOX
• Part Number: FOX883-26-273
• Series: Performance Elite
• Position: Rear
• Shock Type: Adjustable reservoir shock
• Shock Size: 2.5-inch performance shock
• Shock Shaft: 7/8-inch hard-chromed shaft
• Construction: Aluminum body with external reservoir and high-flow piston technology

What's Included

One FOX Performance Elite Series 2.5 Reservoir Adjustable Rear Shock. Installation hardware and vehicle-specific accessories should be verified with the manufacturer or installation instructions before installation.

Fitment

Fits select 2024, 2025, and 2026 INEOS Grenadier models, including the 2025 INEOS Grenadier Quartermaster. Verify exact vehicle configuration and application before ordering.

Features:

• Application-Specific Valving: Vehicle-specific tuning delivers controlled suspension performance for the INEOS Grenadier platform.
• Adjustable Damping: Allows the shock to be tuned for terrain, vehicle load, and driving speed.
• Oversized Aluminum Body: Improves heat dissipation and supports consistent performance during extended off-road use.
• External Reservoir and High-Flow Piston: Increases oil capacity, manages heat, and provides responsive control through demanding terrain.
• Durable Shock Shaft: A 7/8-inch hard-chromed shaft is designed for strength and resistance to harsh operating conditions.
• Redundant Seal Pack: Helps protect internal components from contaminants in severe off-road environments.
• CNC-Machined Aluminum Components: Black anodized components provide durable construction and a finished appearance.
• Fully Serviceable Design: Supports long-term maintenance and lifetime use when properly serviced.

Fitments:
2024 INEOS Grenadier Base
2024 INEOS Grenadier Fieldmaster
2024 INEOS Grenadier Trialmaster
2025 INEOS Grenadier Base
2025 INEOS Grenadier Fieldmaster
2025 INEOS Grenadier Trialmaster
2025 INEOS Grenadier Quartermaster Base
2025 INEOS Grenadier Quartermaster Fieldmaster
2025 INEOS Grenadier Quartermaster Trialmaster
2026 INEOS Grenadier Base
2026 INEOS Grenadier Black Edition
2026 INEOS Grenadier Fieldmaster
2026 INEOS Grenadier Trialmaster
2026 INEOS Grenadier Quartermaster Base
2026 INEOS Grenadier Quartermaster Fieldmaster
2026 INEOS Grenadier Quartermaster Trialmaster

Air Freight Prohibited: false
Not Carb Approved: false
Carb Acknowledgement Required: false
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1