ARB | OME Nitrocharger Plus Rear Shock Absorber (1984-89 4Runner)

ARB | OME Nitrocharger Plus Rear Shock Absorber

For 1984–1989 Toyota 4Runner 

Overview

The ARB Old Man Emu Nitrocharger Plus Rear Shock Absorber is a vehicle-specific rear suspension upgrade for 1984–1989 Toyota 4Runner 4WD models with rear leaf springs. Medium and Heavy load-capacity choices let you match rear-shock tuning to the vehicle’s normal operating weight and permanent equipment.

Its heavy-duty twin-tube, nitrogen gas-charged design provides controlled damping for daily driving, towing, hauling, overlanding, rough roads, and off-road terrain.

Key Features

• Vehicle-specific tuning for 1st Gen 4Runner rear leaf-spring suspension
• Medium and Heavy load-capacity choices
• 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
• Direct fit at the factory rear shock mounting locations
• Available individually or as a pair

Nitrocharger Plus Design

The Nitrocharger Plus uses a durable twin-tube steel shock body to protect critical internal components during demanding road and trail use. Its nitrogen gas charge, high-flow piston, and multi-disc valving help maintain consistent damping as the rear suspension moves through changing terrain and vehicle loads.

Stock Height & Lift Compatibility

These rear shocks support factory rear ride height through approximately 2 inches of rear lift. The matching Old Man Emu 2-Inch Suspension Lift Rear Leaf Springs provide the rear lift; the shock absorber itself does not create vehicle lift.

Vehicle Fitment

Toyota 4Runner

• 1984–1989 Toyota 4Runner – 1st Gen – 4WD – Rear Leaf-Spring Suspension

Fitment Notes

• Choose Medium or Heavy load capacity based on normal operating weight and permanent equipment.
• Engine and transmission choice do not change this rear-shock application.
• Designed for stock ride height through approximately 2 inches of rear lift.
• Uses the factory rear shock mounting locations.

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
Rear Suspension: Leaf Spring
Drivetrain: 4WD
Warranty: 3-Year Limited Warranty

Which Rear Shock Should You Buy?

KYB Excel-G — Best for Factory-Style Comfort & Value

Choose KYB Excel-G for an affordable, factory-style replacement that prioritizes comfortable everyday driving and original-style ride quality at stock height. Its gas-charged twin-tube design emphasizes smooth, predictable damping.

KYB Gas-a-Just — Best for Firmer Stock-Height Control

Choose KYB Gas-a-Just for firmer, more responsive monotube damping without stepping up to Bilstein. It offers a more controlled ride feel without changing suspension height or vehicle load capacity.

Bilstein B6 4600 — Best for Overall Stock-Height Performance

Choose Bilstein B6 4600 for premium monotube damping with controlled, responsive handling during daily driving, highway travel, and light off-road use.

ARB / Old Man Emu Nitrocharger Plus — Best for OME Suspension Builds & Added Weight

Choose OME Nitrocharger Plus for 1984–1989 4Runner 4WD models with matched OME suspension setups, frequent rough-road use, or additional permanent equipment weight. Medium and Heavy valving options support stock height through approximately 2 inches of rear lift.

Our Recommendation: For most stock-height Toyota 4Runner owners, Bilstein B6 4600 is our preferred all-around choice. Choose KYB Excel-G for factory-style comfort and value, KYB Gas-a-Just for firmer budget-friendly control, or Old Man Emu Nitrocharger Plus for 1984–1989 4WD suspension builds and more demanding use.

Available Configurations

Choose the correct Load Capacity and Quantity.

1. Load Capacity

• Medium: Rear-shock tuning for stock-weight or moderately modified 1st Gen 4Runners.
• Heavy: Firmer rear-shock tuning for 1st Gen 4Runners carrying constant additional weight.

2. Quantity

• Single: Includes (1) rear shock absorber.
• Pair: Includes (2) matching rear shock absorbers.

Both load-capacity choices are available individually or as a pair.