KYB Suspension Shock Absorber 3440121
KYB Suspension Shock Absorber 3440121

Rear Shock Absorber for 2017-2022 Ford F-350 Super Duty & More - KYB 3440121

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$74.99
MPN: 3440121
UPC: 781552966548
Item Package Quantity: 1
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KYB Suspension Shock Absorber P/N:3440121
KYB Suspension Shock Absorber P/N:3440121
$74.99

Restore controlled, planted ride quality with the KYB Excel-G gas shock absorber (MPN 3440121), a nitrogen gas-charged, twin-tube damper that drops in as a direct-fit rear replacement for the 2017-2020 Ford F-250 Super Duty and 2017-2022 Ford F-350 Super Duty. KYB classifies the Excel-G as OEA (Original Equipment for the Aftermarket): it is built to restore the truck's original designed damping, not to alter it.

  • Twin-tube, nitrogen gas-charged design: Includes the quality components found in KYB's global OEM products and is a preferred choice among professional technicians.
  • Triple-lip fluid seal: Reduces the chance of oil and gas leaking out of the shock body.
  • Vehicle-specific damping valves: Hand-assembled in-house to manage tire contact, steering response and body movement.
  • Helps restore control and handling: Designed to keep the suspension working as the vehicle manufacturer intended so electronic safety systems can perform as designed.

This is a rear-position shock; two per axle are recommended, so replacing both rear shocks together helps keep ride and control balanced. Signs the original may need replacing include excessive bounce, nose dive, body sway, uneven tire wear, or fluid leaking from the shock body.

Interchange: HC3Z18125AB · HC3Z18125EB · HC3Z18125EM · HC3Z18125EN · HC3Z18125R · HC3Z18125S · HC3Z18125T · HC3Z18125W · LC3Z18125J

This part cross-references / interchanges with the following part numbers:

HC3Z18125AB, HC3Z18125EB, HC3Z18125EM, HC3Z18125EN, HC3Z18125R, HC3Z18125S, HC3Z18125T, HC3Z18125W, LC3Z18125J

Frequently Asked Questions

What vehicles does this KYB shock absorber fit?

It is a direct-fit rear replacement for the 2017-2020 Ford F-250 Super Duty and 2017-2022 Ford F-350 Super Duty. Check the Buyer's Guide tab to confirm fitment for your truck.

Is this a gas shock?

Yes. This KYB gas shock absorber is a nitrogen gas-charged, twin-tube Excel-G design built on KYB's OE assembly lines to restore the vehicle's original damping.

What is the KYB Excel-G line?

The KYB gas shock absorber Excel-G is KYB's OEA (Original Equipment for the Aftermarket) offering, calibrated to restore the truck's original designed control and handling rather than change it.

Do I need to replace both rear shocks?

Shocks are sold individually. Replacing both rear shocks together as a matched pair is recommended so ride quality and control stay balanced from side to side.

How does the KYB excel g shock absorber help prevent leaks?

It uses a triple-lip fluid seal, which reduces the chance of oil and gas leaking out of the shock body during operation.

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