KYB KG54311 Shock Absorber - Front

KYB Gas-a-just Front Shock Absorber

The KYB Gas-a-just KG54311 is a front monotube shock absorber built for Ford truck and SUV applications that need firmer control than a standard twin-tube design. It uses separate gas and oil chambers for quick response, reduced fade, and consistent damping during everyday driving, towing, and load-carrying.

Compatible With 1997-2004 Ford F-150, 1997-2002 Ford Expedition, 1998-2002 Lincoln Navigator, and 1997-1999 Ford F-250 front suspension applications, this KYB Gas-a-just shock absorber is engineered for direct-fit replacement use. The KG54311 part number is also referenced by Monroe Shocks & Struts 911131 for the same application.

Key Features

• Monotube design with separate gas and oil chambers for fade-resistant operation
• Up to 25% more damping performance over 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
• Dust cover included
• Valving and components tuned for Ford truck applications
• Supports vehicles that work, tow, or run larger wheels and tires

Product Details

KYB Gas-a-just shocks are designed around a high-pressure monotube layout that separates the gas and oil to maintain consistent damping under changing road and load conditions. For Ford F-150, Expedition, Navigator, and F-250 front suspension service, the KG54311 provides a responsive upgrade over OE-style twin-tube shocks while preserving ride comfort during normal driving. The extended length is 15 inches, compressed length is 10.12 inches, and stroke length is 4.88 inches. Mounting specifications include lower mount type E3(52X80X30) and upper mount type S1(12MM).

What It Helps Address

• Excessive front-end bounce over bumps and dips
• Reduced control when towing or carrying heavier loads
• Delayed steering response from worn front shocks
• Shock fade during repeated suspension movement
• Fluid leakage caused by seal wear on aging dampers

Installation Notes and Tips

Install the KG54311 on the front position only and verify mount style, compressed length, and extended length before installation. This shock is listed for 1997-2004 Ford F-150, 1997-2002 Ford Expedition, 1998-2002 Lincoln Navigator, and 1997-1999 Ford F-250 front applications, including the noted F-250 configuration with less than 8500 GVW and without rear air leveling. Always inspect related suspension components, tire condition, and mounting points before completing the repair.

Quality Assurance

KYB designs the Gas-a-just line as a performance-oriented monotube shock absorber for vehicles that need consistent damping and stable control. The KG54311 uses a high-pressure gas design and a chrome piston rod to support long-term sealing performance and dependable front suspension operation.