KYB 551130 Suspension Strut - Front Right

KYB Gas-a-Just Front Right Strut for Lexus IS

The KYB Gas-a-Just 551130 is a monotube suspension strut built as an OE-style replacement for the front right corner. It is engineered to restore the original control and handling characteristics of the Lexus IS while adding quick response for heavier-duty driving conditions.

Key Features

• Monotube OEM replacement designed to restore factory suspension behavior
• Separate hydraulic and high-pressure nitrogen chambers for responsive damping and consistent control
• High-pressure design helps maintain fade-free operation during repeated suspension movement
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Internal rebound spring included for controlled extension
• Built for vehicles that tow, work, or run larger, heavier tires and wheels
• Supports proper operation of electronic safety systems by maintaining suspension response as designed

Detailed Description

KYB Gas-a-Just part number 551130 is a front right suspension strut for 2006-2016 Lexus IS350, 2006-2015 Lexus IS250, and 2016 Lexus IS200t applications. This monotube design uses an air-free hydraulic working area for control and a separate high-pressure gas chamber for immediate response, helping the Lexus IS maintain predictable steering and ride quality. This part number 551130 is a direct OE-style replacement for drivers who want suspension performance that matches the vehicle’s original design intent.

The Gas-a-Just line is positioned for vehicles that see demanding use, including heavier wheel and tire setups and frequent load changes. KYB also notes that new strut mounts, part number SM5642, help reduce noise and vibration during installation.

This part cross-references Monroe Shocks & Struts 39131 for the same application.

What It Helps Address

• Excessive front-end bounce or oscillation
• Reduced steering response on the Lexus IS
• Fluid leakage from worn strut seals
• Inconsistent damping during repeated suspension travel
• Noise or vibration from a worn front right strut assembly

Installation Notes and Tips

Fits 2006-2015 Lexus IS250, front right. Fits 2006-2016 Lexus IS350, front right. Fits 2016 Lexus IS200t, front right. Replace the suspension strut and coil spring assembly according to the manufacturer’s instructions. Verify compressed length, extended length, and mount dimensions before installation. KYB recommends replacing the strut mount to help reduce noise and vibration.

Quality Assurance

KYB is an OE suspension supplier, and the Gas-a-Just line is built as a monotube replacement to restore factory-style control and handling. The design separates gas and oil for consistent damping response and uses a chrome piston rod to help reduce seal wear.