KYB 5540041 Gas-A-Just Rear Shock for 03-09 Toyota 4Runner / 07-09 FJ Cruiser

Vehicle Fitment

• 2003-2009 Toyota 4Runner (SR5, Sport, Limited - rear axle)
• 2007-2009 Toyota FJ Cruiser (non-adjustable / non-X-REAS rear suspension) - rear axle

Features

• High-pressure monotube gas shock from KYB's Gas-A-Just line - ideal for work, towing, heavy-duty or SUV use
• Gas-charged design separates hydraulic fluid and nitrogen gas: prevents aeration, resists fade, and ensures instant damping response
• Improved rear-end control and stability under heavy loads, larger tires or off-road conditions
• Robust piston rod with chrome-plating and quality seals for long-term durability and leak prevention
• Telescopic monotube design - stronger structure suited to SUV / 4x4 load demands and larger wheel/tire combos
• Direct-fit replacement shock - uses OEM-style top-stem and bottom-loop mounts for bolt-on installation
• Sold individually - replace one shock or full rear axle as needed
• Restores stock ride height and suspension dynamics while improving load-carrying and towing capability

Specifications

• Position: Rear axle (single shock absorber - left or right side)
• Shock Type: Monotube, gas-charged shock absorber (Gas-A-Just line)
• Lower Mount: Loop-type mount (eyelet)
• Upper Mount: Stem / pin-type mount (OEM standard for 4Runner / FJ Cruiser rear)
• Compressed Length: ~14.21 in
• Extended Length: ~22.01 in
• Stroke Length: ~7.80 in
• Body Diameter: ~1.71 in
• Condition: New, direct-fit replacement shock absorber

Included Components

• 1x KYB 5540041 Rear Shock Absorber (single unit)

Product Description

The KYB 5540041 Gas-A-Just shock absorber is engineered for owners of 2003-2009 Toyota 4Runner and 2007-2009 Toyota FJ Cruiser who need a rugged, reliable rear suspension upgrade - especially for towing, off-road use, or vehicles fitted with larger tires and wheels. Its high-pressure monotube construction and gas-charged design ensure stable damping under load, resist shock fade over repeated impacts, and restore proper ride control and suspension geometry.

Built with a chrome-plated piston rod and premium sealing, it's designed to endure the demanding conditions typical of SUVs: heavy loads, rough terrain, and variable driving conditions. The shock is a direct-fit replacement using OEM mounting points, so installation is straightforward - simply unbolt the old, bolt in the new. Because it is sold individually, you can replace just one side if needed, or handle a full rear-axle refresh as part of maintenance or upgrade.

Whether you're hauling gear, towing, or driving off-road, this Gas-A-Just shock offers enhanced rear-end stability, improved handling under load, and durable long-term performance. For owners of compatible 4Runner and FJ Cruiser models, it is a solid, reliable replacement or upgrade option.