KYB Suspension Shock Absorber P/N:3440137
Bring back firm, controlled damping with this KYB shock absorber — the Gas-a-just High Pressure Monotube Gas Shock (P/N 554366). It installs in the REAR position as a direct-fit replacement for the 2005-2007 Ford F-250 Super Duty and 2005-2016 Ford F-350 Super Duty.
As a KYB gas shock absorber, the Gas-a-just monotube adds damping over the OE design for vehicles that work, tow, and run larger, heavier tires and wheels. The higher gas pressure responds quickly to help improve steering response, and KYB notes it helps keep Electronic Safety Systems performing as designed. Sold individually — replace both sides on the axle together as a matched pair for even, balanced damping.
Interchange: 5C3Z18125CA · 5C3Z18125CB · 5C3Z18125CC · 5C3Z18125CJ · 6C3Z18125CEA · G64010 · 911265
This part cross-references / interchanges with the following part numbers:
Does this KYB shock fit my truck?
It's a rear-position fit for the 2005-2007 Ford F-250 Super Duty and 2005-2016 Ford F-350 Super Duty. Check the Buyer's Guide tab to confirm your exact configuration.
Is this a monotube or twin-tube shock?
It's a high-pressure monotube (Gas-a-just) design that separates the nitrogen gas and oil for fade-free operation and quick response, unlike a traditional twin-tube shock.
How many shocks do I need?
Shocks are sold individually and this listing is for one. Replacing both sides on the axle together as a matched pair is recommended for even, balanced damping.
What does the 25% more damping mean?
KYB states the Gas-a-just adds up to 25% more damping performance over original-equipment shocks, with components and valving designed specifically for Ford trucks.
Is the KYB shock absorber price for one or a pair?
The price is for a single shock (P/N 554366). Order two if you plan to replace the complete rear axle set at the same time.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.