KYB 551129 Suspension Strut - Front Left

Overview of KYB Gas-a-just Suspension Strut 551129

The KYB Gas-a-just suspension strut 551129 is engineered for Lexus GS300 and GS350 models, providing reliable shock absorption and improved ride control. Designed with precise dimensions and internal components, this strut supports vehicle stability and handling.

• Compressed length: 13.45 inches
• Extended length: 16.94 inches
• Stroke length: 3.49 inches
• Upper mount type: 12x1.25
• Internal rebound spring included
• R-stop feature present
• No dust cover or B-stop included

Details on KYB Gas-a-just Product Line

The Gas-a-just line by KYB focuses on gas-charged struts designed to restore original vehicle handling and control. This product line incorporates an internal rebound spring to maintain consistent damping performance, which is critical for Lexus GS300 and GS350 models. The 551129 strut is part of this line, offering a balance of durability and ride comfort through its gas pressure technology.

Technical Description of Part Number 551129

This suspension strut features a compressed length of 13.45 inches and extends to 16.94 inches, providing a stroke length of 3.49 inches. The upper mount thread size is 12x1.25, ensuring proper fitment for the specified Lexus models. The internal rebound spring enhances shock absorption by controlling rebound forces, while the R-stop feature prevents overextension. The absence of a dust cover and B-stop indicates a design optimized for specific mounting conditions and vehicle requirements.

Applications and Problem Solving

• Restores original suspension performance on Lexus GS300 and GS350
• Reduces excessive bouncing and improves ride stability
• Addresses uneven tire wear caused by worn struts
• Minimizes noise and vibration from suspension components
• Improves vehicle handling during acceleration and braking

Installation Notes and Tips

Ensure compatibility with Lexus GS300 and GS350 models before installation. Verify the upper mount thread size (12x1.25) matches the vehicle specifications. Since this strut does not include a dust cover, inspect the mounting area for debris or damage prior to installation. Proper torque settings should be followed to maintain safety and performance. Professional installation is recommended for optimal results.

Quality Assurance and Warranty

KYB Gas-a-just struts are manufactured to meet OEM standards for fit and function. The internal rebound spring and R-stop features contribute to consistent damping and durability. While specific warranty details are not provided here, KYB typically offers coverage against defects in materials and workmanship. Refer to KYB’s official documentation for exact warranty terms.