ARB | OME Nitrocharger Plus Rear Shock Absorber 4WD (1984-89 4Runner)
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ARB | OME Nitrocharger Plus Rear Shock Absorber
For 1984ā1989 Toyota 4Runner 4WD
Overview
The ARB Old Man Emu Nitrocharger Plus Rear Shock Absorber is a vehicle-specific rear suspension upgrade for the 1984ā1989 1st Gen Toyota 4Runner 4WD.
Designed for stock ride height through approximately 2 inches of rear lift, the Nitrocharger Plus combines application-specific damping with a heavy-duty twin-tube, nitrogen gas-charged design. It provides controlled rear suspension performance across daily driving, towing, hauling, overlanding, rough roads, and off-road terrain.
Medium Load and Heavy Load valving options allow the shock to be matched more closely to the 4Runner's normal operating weight and permanent equipment.
Key Features
- Vehicle-specific Old Man Emu rear shock tuning
- Designed for stock ride height through approximately 2 inches of rear lift
- Heavy-duty twin-tube steel construction
- Nitrogen gas-charged design
- High-flow piston with multi-disc compression valving
- Controlled damping across pavement, rough roads, and off-road terrain
- Direct-fit installation at factory rear shock mounting locations
- Medium Load and Heavy Load valving options
- Works with factory or properly configured aftermarket rear suspension systems
- Available individually or as a pair
Nitrocharger Plus Design
The Nitrocharger Plus uses a durable twin-tube steel shock body designed to protect critical internal components during demanding road and trail use.
Its nitrogen gas charge, high-flow piston, and multi-disc compression valving provide consistent damping as the rear suspension cycles through changing terrain and vehicle loads. The shock can be used with the factory suspension or incorporated into a properly configured Old Man Emu suspension system.
Stock Height & Lift Compatibility
The Nitrocharger Plus supports factory rear ride height through approximately 2 inches of rear lift.
The shock absorber itself does not lift the vehicle. Rear ride height is determined by the leaf springs and overall suspension configuration.
When paired with appropriately configured Old Man Emu rear leaf springs, these shocks can be used as part of a complete mild-lift suspension system.
Vehicle Fitment
Toyota 4Runner
- 1984ā1989 Toyota 4Runner ā 1st Gen ā 4WD ā Rear
Fitment Notes
- 4WD models only
- Rear shock absorber application
- Uses factory rear shock mounting locations
- Designed for stock ride height through approximately 2 inches of rear lift
- Works with factory and properly configured aftermarket rear suspension systems
- Select Medium Load or Heavy Load valving based on normal operating weight and permanent equipment
- Shock absorber does not create vehicle lift
- Professional installation recommended
Product Specifications
Brand: ARB / Old Man Emu
Series: Nitrocharger Plus
Product Type: Rear Shock Absorber
Position: Rear
Design: Twin Tube
Gas Charged: Yes
Body Material: Steel
Bushings: Rubber / Polyurethane
Color: Yellow
Ride Height: Stock to Approximately 2-Inch Rear Lift
Drivetrain: 4WD
Installation: Direct Fit / Bolt-On
Warranty: 3-Year Limited Warranty
Old Man Emu vs. Bilstein B6 4600
Bilstein B6 4600
Better suited for lighter, primarily stock-height 4Runners where responsive handling and controlled on-road damping are the main priorities.
Old Man Emu Nitrocharger Plus
Better suited for 4Runners that regularly see off-road use, rough roads, towing, hauling, or additional permanent weight from bumpers, armor, tire carriers, storage systems, camping equipment, and other accessories. It is also a natural choice when building a complete Old Man Emu suspension system.
For a mostly stock-height daily driver, the Bilstein B6 4600 is generally the better starting point. For heavier builds, frequent off-road use, or an OME suspension setup, choose the Old Man Emu Nitrocharger Plus.
Available Configurations
Choose the appropriate Valving and Quantity for your 4Runner.
Valving
- Medium Load ā Best suited for stock-weight or moderately modified vehicles, daily driving, and occasional cargo
- Heavy Load ā Designed for vehicles carrying constant additional weight from permanently installed accessories or equipment
Select valving based on the vehicle's normal operating weight and permanent equipment, rather than occasional temporary cargo.
Quantity
- Single Rear Shock ā (1) ARB Old Man Emu Nitrocharger Plus Rear Shock Absorber
- Pair of Rear Shocks ā (2) ARB Old Man Emu Nitrocharger Plus Rear Shock Absorbers
Replacing rear shocks as a pair is recommended to maintain balanced damping and consistent rear suspension performance.