Bring your heavy-duty Ford's ride and handling back under control with the KYB Excel-G Suspension Shock Absorber 3440029, a nitrogen gas-charged, twin-tube rear gas shock built to restore the vehicle's original designed capabilities. It drops in as a direct-fit rear replacement for the 2005-2016 Ford F-450 Super Duty and 2005-2016 Ford F-550 Super Duty — see the Buyer's Guide tab for full engine-level fitment. Excel-G is made on the same KYB OE assembly lines using the same OE-quality components and is calibrated to restore original performance, not change it, earning its OEA (Original Equipment for the Aftermarket) classification.
- Restores designed control: Helps restore the designed control and handling of your Ford F-450 and F-550.
- Triple lip fluid seal: Reduces the chance of oil and gas leaking out.
- Vehicle-specific valving: Hand-assembled, in-house damping valves manage tire contact, steering response, and body movement.
- Heavy-duty ready: KYB-recommended OEM replacement shock for Heavy Duty Trucks and Commercial Vehicles, helping keep electronic safety systems performing as designed.
Interchange: 5C3Z18125DA · 7C3Z18125DCA · 7C3Z18125DJA · BC3Z18125AP · BC3Z18125G · BC3Z18125H
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What vehicles does this KYB shock fit?
It's a direct-fit rear shock for the 2005-2016 Ford F-450 Super Duty and 2005-2016 Ford F-550 Super Duty. Check the Buyer's Guide tab to confirm the exact fit for your truck.
Is this a rear or front shock?
This is a rear-position suspension shock absorber for the listed applications.
What type of shock is the Excel-G 3440029?
It's a nitrogen gas-charged, twin-tube gas shock built on KYB's OE assembly lines with OE-quality components, classified as OEA (Original Equipment for the Aftermarket).
Will this change or improve my truck's ride?
Excel-G is calibrated to restore the vehicle's original designed performance and handling, not to alter it. It helps restore the control the truck had when new.
Should I replace shocks in pairs?
This listing is for one shock. Replacing the rear pair together is a common best practice for balanced, even damping. Confirm your truck's requirements in the service information.
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