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Tune rear-end control for the road, trail, and changing vehicle load
King Shocks 25001-418A is a matched adjustable rear pair for the INEOS Grenadier, combining 2.5-inch bodies, remote reservoirs, and 7/8-inch hard-chromed shafts. The vehicle-specific damping and glove-friendly compression adjusters let the driver refine rear response without replacing the shocks.
Key Features
- Exact 25001-418A adjustable front configuration
- Matched pair with remote reservoirs
- Fits stock suspension, leveling kits, and lifts up to 2 inches
- 2.5-inch bodies and 7/8-inch hard-chromed shafts
- Wide-range compression adjusters with tactile detents
- Vehicle-specific dynamometer and real-world tuning
- Fully rebuildable, serviceable, and tunable
- Direct bolt-on installation
Fitment
| Years | Make | Model | Drivetrain | Position | Lift Range | Verified Notes |
|---|---|---|---|---|---|---|
| 2023-2026 | INEOS | Grenadier | 4WD | Rear | Stock to 2 inches | Use complete adjustable 25001-418A pair; Base, Fieldmaster, and Trialmaster are supported where the vehicle retains the compatible factory rear mounting geometry |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | 25001-418A |
| Product Type | Adjustable rear piggy-hose remote-reservoir shock pair |
| Body Diameter | 2.5 inches |
| Shaft Diameter | 7/8 inch |
| Stroke | 9.102 inches |
| Compressed Length | 15.438 inches |
| Extended Length | 24.352 inches |
| Published Gas Pressure | 200 psi |
| Position | Rear |
| Quantity | Two shocks |
| Compression Adjuster | Yes |
What's Included
- Two King Shocks 25001-418A rear piggy-hose remote-reservoir shocks
- Two reservoir-mounted compression adjusters
- Vehicle-specific mounting components and instructions supplied in the sealed King package
About King Shocks
King Shocks develops rebuildable off-road dampers using large fluid volumes, hard-chromed shafts, precision-machined components, and application-specific testing. OEM Performance kits retain serviceability while adding vehicle-tuned damping and heat capacity.
Related Parts
- King front shocks specified for the same Grenadier lift range
- King service oil, seals, and nitrogen-service parts matched to the exact configuration
- Alignment and suspension hardware selected for the verified installed ride height
FAQ
What is the 25001-418A?It is a matched pair of adjustable 2.5-inch rear piggy-hose remote-reservoir shocks for the 2023-2026 INEOS Grenadier.
Which Grenadier configurations are supported?King lists 2023-2026 INEOS Grenadier 4WD applications with stock suspension, leveling kits, or lifts up to 2 inches.
How many shocks are included?The package contains a matched pair of rear shocks with remote reservoirs and wide-range compression adjusters.
What is the shock travel?King publishes 9.102 inches of stroke, a 15.438-inch compressed length, and a 24.352-inch extended length.
What gas pressure is specified?King publishes a 200 psi gas pressure for this exact configuration; service should use the correct dry-nitrogen equipment and procedure.
What do the adjusters control?The reservoir-mounted knobs provide click-by-click compression damping adjustment to refine ride and control.
Are the shocks rebuildable?Yes. King describes the pair as fully rebuildable, serviceable, and tunable.
Where are these installed?They install at the rear suspension only and are designed as a direct bolt-on pair.
Installation Instructions
- Confirm the vehicle year, rear mounting geometry, and installed lift height before disassembly.
- Park on a level surface, chock the wheels, and support the chassis and rear axle with appropriately rated equipment.
- Remove the original rear shocks while controlling axle movement and protecting brake hoses, wiring, and steering components.
- Install each King shock on its corresponding side and mount the reservoirs so the hoses are not twisted, kinked, or exposed to heat and tire contact.
- Torque every fastener to the King and INEOS service specifications.
- Set both compression adjusters to the same starting position, then cycle steering and suspension through full travel to verify clearance.
- Road-test at low speed, make equal click changes side to side, and recheck all mounts and fasteners after the initial driving interval.
California Proposition 65 Warning: Motor vehicle parts can expose you to chemicals known to the State of California to cause cancer and reproductive harm. Wash hands after handling and follow applicable safety procedures.
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