KYB KG54300 Shock Absorber - Front

KYB Gas-a-Just Front Shock Absorber

The KYB Gas-a-Just KG54300 is a front suspension shock absorber built as an OE-style monotube replacement for Toyota Land Cruiser and Lexus LX450 applications. It uses separate hydraulic and high-pressure gas chambers to deliver responsive damping, stable control, and a consistent ride during everyday driving.

For drivers of a Toyota Land Cruiser or Lexus LX450 with coil spring front suspension, this KYB Gas-a-Just shock is engineered for direct replacement service and firmer control than a standard twin-tube design. Part number KG54300 is also a common search term for front shock replacement on these vehicles.

Key Features

• Monotube shock absorber design with separate gas and oil chambers for fade-resistant operation
• Up to 25% more damping performance than original equipment shocks
• Higher gas pressure for quicker steering response and improved control
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Designed specifically for Toyota Land Cruiser and Lexus LX450 front suspension applications
• Dust cover included
• Compressed length: 14.02 in; extended length: 23.07 in; stroke length: 9.05 in

Product Details

KYB Gas-a-Just shocks are built for vehicles that work harder than a typical commuter setup, including Land Cruiser and LX450 models with heavier tires, wheels, or towing demands. The monotube construction keeps the hydraulic and nitrogen gas sections separated, which supports consistent damping response and stable handling over repeated suspension movement. KG54300 is a front shock absorber with S1(12MM) upper and lower mounts, and it is listed as a recommended OEM replacement for the specified Toyota and Lexus applications.

This part cross-references Monroe Shocks & Struts (e.g., 34787) for the same application.

What It Helps Address

• Excessive front-end bounce after bumps or dips
• Loose or delayed steering response
• Reduced control from worn OE shocks
• Fade in damping performance during repeated suspension travel
• Leak-related shock failure from worn piston rod seals

Installation Notes and Tips

• Fits 1991-1997 Toyota Land Cruiser, front.
• Fits 1998 Toyota Land Cruiser, front, recommended OEM replacement; coil spring front suspension; to 1/98.
• Fits 1996-1997 Lexus LX450, front, recommended OEM replacement; coil spring front suspension; exc. adjustable suspension.
• Verify mount style, compressed length, and extended length before installation.
• Inspect related suspension components such as bushings and upper mounts during shock replacement.

Quality Assurance

KYB designs the Gas-a-Just line as an OE monotube replacement series, with valving and components matched to the Land Cruiser and LX450 front suspension applications. Part number KG54300 is built to restore original suspension function with direct-fit service characteristics.