KYB 554366 Shock Absorber - Rear

Overview of KYB Gas-a-just Shock Absorber 554366

The KYB Gas-a-just suspension shock absorber 554366 is engineered for Ford F-250 Super Duty and F-350 Super Duty trucks. Designed to restore original ride quality, this shock absorber offers precise damping performance tailored to heavy-duty applications.

• Compressed length: 16.33 inches
• Extended length: 26.53 inches
• Stroke length: 10.20 inches
• Lower mount type: E2 (12x38)
• Upper mount type: E1
• Includes dust cover for protection
• No internal rebound spring, B-stop, or R-stop

Detailed Product Features and Specifications

This KYB Gas-a-just shock absorber (part number 554366) features a compressed length of 16.33 inches and an extended length of 26.53 inches, providing a stroke length of 10.20 inches. The lower mount uses an E2 (12x38) configuration, while the upper mount is an E1 type, ensuring proper fitment and secure installation on Ford F-250 Super Duty and F-350 Super Duty models. The included dust cover helps protect the shock shaft from dirt and debris, extending the service life of the component. This shock absorber does not include an internal rebound spring, B-stop, or R-stop, which is consistent with the Gas-a-just design focused on reliable gas-charged damping performance.

About the KYB Gas-a-just Product Line

The Gas-a-just line from KYB is designed to provide consistent and controlled damping for trucks and SUVs that require durable suspension components. This product line uses gas-charged technology to reduce shock fade and improve handling under load. The 554366 shock absorber is part of this line, offering a balance of performance and durability specifically for heavy-duty Ford Super Duty trucks.

Common Applications and Problem Solving

• Restores factory ride quality on Ford F-250 Super Duty and F-350 Super Duty
• Reduces excessive bouncing and body roll during towing or hauling
• Improves vehicle stability on rough or uneven terrain
• Minimizes noise and vibration from worn or damaged shocks
• Prevents premature tire wear caused by suspension issues

Installation Notes and Tips

When installing the KYB Gas-a-just shock absorber 554366, ensure the vehicle is securely lifted and supported. Verify the upper mount type E1 and lower mount type E2 (12x38) match the vehicle’s mounting points. It is recommended to replace shocks in pairs to maintain balanced suspension performance. Inspect mounting hardware and replace if worn or damaged. The included dust cover should be positioned correctly to protect the shock shaft from contaminants.

Quality Assurance and Warranty

KYB manufactures the Gas-a-just shock absorbers to meet or exceed OEM specifications. The 554366 part undergoes rigorous quality control to ensure durability and consistent performance. While specific warranty details are not provided here, KYB typically offers a limited warranty covering defects in materials and workmanship. Consult KYB or authorized distributors for exact warranty terms.