Tame rear-end body motion and sharpen control with the KYB Gas-a-just Suspension Shock Absorber 555051, a high-pressure monotube gas shock that installs as a rear direct-fit replacement for the 2005-2021 Nissan Frontier. Its components and valving are designed specifically for Nissan Frontiers.
- Monotube gas design: Two separate working chambers — an air-free hydraulic piston and valve area for responsiveness and control, plus a high-pressure nitrogen chamber with a floating piston that separates gas and oil for fade-free operation and instant response.
- Extra damping: Adds up to 25% more damping performance over original-equipment shocks, with added damping intended for vehicles that work, tow, and run larger, heavier tires and wheels.
- Ultra-smooth rod: A triple-chrome-plated piston rod is designed to reduce seal wear, since fluid leaking can be a cause of shock failure.
- Steering feel: The higher gas pressure is designed to respond quickly to help improve steering response, and KYB notes the Gas-a-just helps keep Electronic Safety Systems performing as designed.
Shocks wear as a pair, so replacing both rear units together is recommended for balanced damping. Sold individually — this listing is for one.
Interchange: G64031 · 37273 · 56200EB085 · 56200ZP025 · E6200ZL40A · E6200ZP50A
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What vehicle does this KYB 555051 shock fit?
It is a rear direct-fit replacement for the 2005-2021 Nissan Frontier. Confirm the exact application for your vehicle in the Buyer's Guide tab.
Is this a monotube or twin-tube shock?
It is a high-pressure monotube gas shock. It separates the gas and oil for fade-free operation and instant response, unlike a traditional twin-tube design.
How much more damping does it provide?
KYB states the Gas-a-just adds up to 25% more damping performance over original-equipment shocks, with added damping suited to vehicles that work, tow, or run larger tires and wheels.
Does this shock mount on the front or rear?
The catalog lists this as a rear shock absorber. Order according to the position you need on your Frontier.
Should I replace both shocks at once?
Replacing both rear shocks together as a pair is recommended for even, balanced damping. This listing is for one shock, so order two for a complete rear set.
Write a Review