KYB KG54308 Shock Absorber - Rear

KYB Gas-a-Just Rear Shock Absorber

The KYB Gas-a-Just KG54308 is a monotube rear shock absorber built to restore OE-style control for select Isuzu, Acura, and VehiCROSS applications. Its high-pressure gas design separates gas and oil for consistent response, while the valving is tuned for vehicles that carry extra load, tow, or run larger wheels and tires.

Key Features

• Monotube shock design with separate gas and oil chambers for fade-resistant operation
• Up to 25% more damping performance than original equipment shocks
• Vehicle-specific valving and components for the listed applications
• Higher gas pressure for quicker steering response and improved control
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Dust cover included
• Rear position fitment for the listed vehicles

Detailed Product Overview

Gas-a-Just is KYB’s monotube shock line for drivers who want firmer control than a standard OE twin-tube design. The KG54308 uses an air-free hydraulic working area and a separate high-pressure nitrogen chamber with a floating piston, which helps maintain consistent damping during normal driving and delivers immediate response when suspension demand increases. This makes it a practical choice for rear suspension service on 1992-2002 Isuzu Trooper, 1999-2001 Isuzu VehiCROSS, and 1996-1999 Acura SLX models.

This part number, KG54308, is engineered for rear suspension use and is commonly selected when replacing worn shocks on vehicles that need stable handling, controlled body motion, and predictable ride quality. This part cross-references Monroe Shocks & Struts (e.g., 37109) for the same application.

Common Problems This Shock Can Address

• Excessive rear-end bounce after bumps or dips
• Reduced steering response and loose handling feel
• Suspension fade during repeated load changes
• Oil leakage from worn shock seals
• Unstable ride quality on vehicles with heavier tires and wheels

Installation Notes and Tips

• Fits 1992-2002 Isuzu Trooper, rear.
• Fits 1999-2001 Isuzu VehiCROSS, rear.
• Fits 1996-1999 Acura SLX, rear.
• Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions where specified.
• Verify mount style and compressed/extended length before installation: compressed length 12.68 in., extended length 19.57 in., stroke length 6.89 in.
• Confirm the upper and lower mount types match the vehicle before service.

Quality Assurance

KYB designs Gas-a-Just shocks as OE monotube replacement components for the listed applications. The KG54308 is built with a triple chrome plated piston rod and a high-pressure monotube layout to support consistent damping performance and reduced seal wear.