Sharpen steering response and keep body motion in check with the KYB Gas-a-just Suspension Strut 551128, a high-pressure monotube gas strut that installs in the front right position. It's a direct-fit replacement for the 2006 Lexus GS300 and the 2007-2011 Lexus GS350, engineered as a monotube OEM-style replacement to help restore the designed control and handling of the Lexus GS300.
- Two working chambers: An air-free hydraulic piston and valve area handles responsiveness and control, while a separate high-pressure nitrogen gas area with a floating piston supports a comfortable ride and adds instant performance on demand.
- High-pressure monotube design: Separates the gas and oil for fade-free operation and instant response, with higher gas pressure that responds quickly to improve steering response.
- Triple chrome-plated piston rod: Since fluid leaking can be a cause of shock failure, the ultra-smooth rod is designed to reduce seal wear.
- Built to work: Gas-a-just monotubes are designed for vehicles that work, tow, and run larger, heavier tires and wheels, and help keep Electronic Safety Systems performing as designed.
To reduce the chance of noise and vibration, KYB recommends installing new strut mounts, part number SM5738.
Interchange: 4851080215 · 4851080301 · 4851080302 · 4851080427 · 4851080437 · 4851080441
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What vehicles does the KYB 551128 strut fit?
It's a direct-fit replacement for the 2006 Lexus GS300 and the 2007-2011 Lexus GS350. See the Buyer's Guide tab to confirm fitment for your vehicle.
Where does this strut install?
This strut installs in the front right position. It's sold individually, so order the quantity your repair requires.
What is a high-pressure monotube gas strut?
It uses a monotube design that separates the gas and oil into distinct chambers for fade-free operation and instant response, with high-pressure nitrogen to help control body motion.
Why does it have a triple chrome-plated piston rod?
Fluid leaking can be a cause of shock failure, so the ultra-smooth triple chrome-plated rod is designed to reduce seal wear for durable sealing.
Should I replace the strut mounts too?
To reduce the chance of noise and vibration, KYB recommends installing new strut mounts, part number SM5738, along with this strut.
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