KYB 554378 Shock Absorber - Rear

Overview of KYB Gas-a-just Suspension Shock Absorber 554378

The KYB Gas-a-just Suspension Shock Absorber 554378 is engineered to provide reliable damping performance for select Buick, Chevrolet, GMC, and Saturn SUVs. Designed specifically for models like the Acadia, Acadia Limited, Enclave, Outlook, and Traverse, this shock absorber helps maintain vehicle stability and ride comfort under various driving conditions.

• Compressed length: 11.02 inches
• Extended length: 15.94 inches
• Stroke length: 4.92 inches
• Lower mount type: E2 (14.2x43)
• Upper mount type: E2 (12.2x95.5)
• Includes dust cover for protection
• R-stop feature included for controlled rebound
• Internal rebound spring not included
• B-stop feature not included

Detailed Features and Specifications

This KYB Gas-a-just shock absorber (part number 554378) is designed with precise dimensions to fit the suspension systems of Buick Acadia, Chevrolet Traverse, GMC Acadia Limited, Saturn Outlook, and Enclave models. The compressed length of 11.02 inches and extended length of 15.94 inches provide a stroke length of 4.92 inches, ensuring optimal travel for effective shock absorption. The E2 lower and upper mount types (14.2x43 and 12.2x95.5 respectively) allow for secure and proper installation. A dust cover is included to protect the internal components from dirt and debris, extending the service life of the shock absorber. The R-stop feature helps control rebound movement, improving vehicle handling and stability, while the absence of an internal rebound spring and B-stop indicates a design focused on consistent damping performance.

About the KYB Gas-a-just Product Line

The Gas-a-just line from KYB is known for its gas-charged shock absorbers that deliver consistent damping and improved ride quality. This product line is engineered to restore the original handling and control characteristics of the vehicle by using pressurized nitrogen gas to reduce aeration and foaming inside the shock. The 554378 shock absorber is part of this line, providing a balance of comfort and control tailored for mid-size SUVs like the Buick Acadia and Chevrolet Traverse.

Common Applications and Problem Solving

• Reduces excessive bouncing and body roll during cornering
• Improves vehicle stability on uneven or rough roads
• Restores proper suspension travel and ride height
• Minimizes noise and vibration from worn shocks
• Enhances braking performance by maintaining tire contact

Installation Notes and Tips

When installing the KYB Gas-a-just shock absorber 554378, ensure compatibility with the specific make and model, including Buick Acadia, Chevrolet Traverse, GMC Acadia Limited, Saturn Outlook, and Enclave. Verify the mount types (E2 lower and upper) match the vehicle’s suspension mounts. It is recommended to replace shocks in pairs (both front or both rear) to maintain balanced handling. Use proper tools to avoid damage to the dust cover and mounting points during installation. Follow manufacturer torque specifications for mounting hardware.

Quality Assurance and Warranty

KYB manufactures the Gas-a-just shock absorbers to meet or exceed OEM standards, ensuring durability and consistent performance. The part number 554378 undergoes rigorous quality control to provide reliable suspension damping. While specific warranty details may vary, KYB typically offers a limited warranty covering defects in materials and workmanship. Consult KYB or the product documentation for exact warranty terms.