KYB 551126 Suspension Strut - Front Right

KYB Gas-a-Just Front Right Strut

KYB Gas-a-Just 551126 is a monotube suspension strut built as an OE-style replacement for the front right corner. It is listed for 2006-2013 Lexus IS250 and 2011-2013 Lexus IS350 applications, with a focus on restoring steering response, ride control, and suspension consistency.

Key Features

• Monotube OE replacement design for direct suspension service
• Separate hydraulic and high-pressure nitrogen chambers for responsive damping
• High-pressure construction supports fade-resistant operation and quick response
• Triple chrome plated piston rod helps reduce seal wear from fluid leakage
• Built for vehicles that tow, work, or use larger, heavier tires and wheels
• Supports the suspension performance required by electronic safety systems
• Front right position for Lexus IS fitment

Product Details

The KYB Gas-a-Just line is engineered for drivers who want OE monotube replacement performance with firmer control than a conventional twin-tube design. Part number 551126 uses an air-free hydraulic working area for damping response and a separate high-pressure nitrogen chamber with a floating piston to maintain consistent operation during normal driving and add immediate performance when suspension demand increases. For Lexus IS250 and Lexus IS350 models, this front right strut helps restore the handling balance the vehicle was designed to deliver.

This part cross-references Monroe Shocks & Struts (e.g., 39131, 39138) for the same application.

What It Helps Address

• Excessive front-end bounce or oscillation
• Loose steering feel or delayed response
• Reduced control over bumps and uneven pavement
• Suspension fade during repeated load changes
• Wear-related performance loss from leaking or weakened struts

Installation Notes and Tips

Fits 2006-2013 Lexus IS250, front right. Fits 2011-2013 Lexus IS350, front right. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify the upper mount thread specification is 12x1.25 before installation. Confirm the existing suspension components, ride height, and mounting points match the vehicle application before service.

Quality Assurance

KYB designs the Gas-a-Just series as an OE monotube replacement to restore original suspension capability. The monotube layout, high-pressure gas charge, and chrome piston rod construction are used to support consistent damping, steering response, and long-term seal protection in normal street use.