Keep your Super Duty planted and controlled with the KYB Gas-a-just Suspension Shock Absorber 554363, a rear high-pressure monotube gas shock that installs as a direct-fit replacement for the 2005-2007 Ford F-350 Super Duty and 2005-2007 Ford F-450 Super Duty. Its components and valving are designed specifically for Super Duty Ford trucks that work, tow, and run larger, heavier tires and wheels.
- Monotube gas design: the high-pressure monotube separates the gas and oil for fade-free operation and instant response, avoiding the aeration that can affect traditional twin-tube shocks.
- Two working chambers: an air-free hydraulic piston and valve area for responsiveness and control, plus a high-pressure nitrogen chamber with a floating piston for a comfortable ride during normal driving.
- Added damping: adds up to 25% more damping performance over original equipment shocks, with higher gas pressure intended to improve steering response.
- Reduced seal wear: an ultra-smooth triple chrome plated piston rod is designed to reduce seal wear, since fluid leaking can be a cause of shock failure.
The Gas-a-just also helps keep Electronic Safety Systems performing as designed, since those systems depend on the suspension, brakes, and tires operating as the vehicle manufacturer intended.
Interchange: 5C3Z18125CF · G63964 · 911039
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What vehicles does the KYB 554363 shock fit?
It is a direct-fit rear shock absorber for the 2005-2007 Ford F-350 Super Duty and 2005-2007 Ford F-450 Super Duty. Check the Buyer's Guide tab to confirm fitment for your truck.
Is this a front or rear shock?
This is a rear position shock absorber. Its components and valving are designed specifically for Super Duty Ford trucks.
What is a monotube gas shock?
A high-pressure monotube design separates the gas and oil into two chambers for fade-free operation and instant response, avoiding the aeration that can affect twin-tube shocks.
How much extra damping does it provide?
KYB states the Gas-a-just adds up to 25% more damping performance over original equipment shocks, with higher gas pressure intended to improve steering response.
What are signs my shocks may need replacing?
Common signs include excessive bounce over bumps, nose dive when braking, reduced control, or fluid leaking from the shock body. Diagnose the cause before replacing.
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