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KYB 2010 - 2024 Toyota 4Runner / 2010 - 2014 FJ Cruiser RWD /  Lexus GX460  Gas-a-Just Shock - Rear
KYB

KYB 2010 - 2024 Toyota 4Runner / 2010 - 2014 FJ Cruiser RWD / Lexus GX460 Gas-a-Just Shock - Rear

Regular price $124.22 $0.00 Unit price per
Shipping calculated at checkout.

5540040

The KYB Gas-a-Just monotube shock absorber has additional performance advantages over the traditional twin-tube design: It can instantly, automatically adjust to your performance needs and never experiences fade due to aeration. The Gas-a-Just is available as an OE monotube replacement and as an OE twin-tube performance upgrade. The KYB Gas-a-Just has two separate working chambers: An air-free hydraulic piston and valve area for responsiveness & control, and a second high-pressure nitrogen gas area with a floating piston that provides a comfortable ride during normal driving and adds instant performance on demand.


  • The correct, monotube-designed OEM replacement shock
  • Specifically calibrated to help restore the original handling and control characteristics
  • Unique, air-free, hydraulic unit eliminates performance fade
Boot Included No
Gas Charged Yes
Compressed Length 18.5 in
Lower Mount Type Eyelet
Bearing Plate Included No
Manufacturer Part Number 5540004
Sub Brand Gas-a-just
VMRS Code 16003000
Adjustable No
Coil Over Springs Included No
Upper Mount Type Stud
Brand KYB
Design Monotube
Lower Mounting Isolator Included No
Extended Length 24.05 in

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