KYB 551108 Suspension Strut - Rear

Overview of KYB Gas-a-just Suspension Strut 551108

The KYB Gas-a-just suspension strut 551108 is engineered for Lexus GS300 and GS350 models, providing reliable damping performance. Designed to restore original handling and ride quality, this strut is a direct replacement part tailored to specific vehicle requirements.

• Compressed length: 16.82 inches
• Extended length: 21.51 inches
• Stroke length: 4.69 inches
• Lower mount type: E2 (14.2x60)
• Upper mount type: 12x1.25
• Internal rebound spring included
• R-stop feature included, B-stop not included
• Dust cover not included

Details on KYB Gas-a-just Product Line

The Gas-a-just line from KYB is designed to offer a gas-charged strut solution that balances comfort and control. This product line focuses on maintaining factory ride characteristics while improving damping response. The 551108 strut benefits from this technology, ensuring consistent performance for Lexus GS300 and GS350 vehicles.

Technical Description of Part Number 551108

This suspension strut features a compressed length of 16.82 inches and an extended length of 21.51 inches, providing a stroke length of 4.69 inches. The lower mount uses an E2 type with dimensions 14.2x60, while the upper mount is sized 12x1.25. An internal rebound spring is integrated to enhance shock absorption and vehicle stability. The strut includes an R-stop to prevent overextension but does not have a B-stop or dust cover included.

Common Applications and Problem Solving

• Restores proper suspension travel and damping for Lexus GS300 and GS350
• Addresses issues with worn or leaking struts causing poor handling
• Reduces excessive body roll and improves ride comfort
• Eliminates noise and vibration related to damaged suspension components
• Helps maintain vehicle alignment and tire wear consistency

Installation Notes and Tips

• Compatible specifically with Lexus GS300 and GS350 models; verify fitment before installation
• Ensure proper torque specifications for upper and lower mounts (12x1.25 upper, E2 14.2x60 lower)
• Check for any suspension component wear or damage during installation
• Use appropriate tools to avoid damage to the internal rebound spring mechanism
• Alignment check recommended after installation

Quality Assurance and Warranty

KYB suspension struts, including the Gas-a-just 551108, are manufactured to meet OEM standards for durability and performance. The internal rebound spring and R-stop features contribute to consistent operation under various driving conditions. Warranty coverage details should be confirmed with the point of purchase or KYB directly.