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KYB Suspension 554389 Gas-a-Just Monotube High Pressure Gas Shock Absorber

(2011-2025 Chevrolet Silverado 2500 HD; 2011-2020 Chevrolet Silverado 3500 HD; 2011-2024 GMC Sierra 2500 HD; 2011-2020 GMC Sierra 3500 HD)

Part of: KYB Suspension Gas-a-Just Monotube High Pressure Gas Shock Absorber

Other options in this family: KYB Suspension KG54317 KYB Suspension KG5462 KYB Suspension KG4752 KYB Suspension 554348 KYB Suspension KG5440

Manufacturer

Picture for manufacturer KYB Suspension

Part Number

554389
11 reviews
Sale Price

$85.15

2 left at this price

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Usually delivered within 2 days

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Product Details

The KYB Gas-a-Just 554389 is a high-performance monotube gas shock absorber engineered to deliver superior handling and responsiveness compared to traditional twin-tube designs. This advanced shock technology provides instant, automatic adjustment to changing driving conditions without experiencing fade due to aeration.

Monotube Performance Advantages:

  • Dual-chamber design separates hydraulic fluid and high-pressure nitrogen gas for consistent performance
  • Air-free hydraulic piston and valve area ensures precise responsiveness and control
  • High-pressure nitrogen gas chamber with floating piston provides on-demand performance
  • Delivers comfortable ride quality during normal driving with instant firming under demanding conditions
  • Fade-free operation eliminates performance loss from fluid aeration
  • Enhanced heat dissipation through monotube construction maintains consistent damping

The Gas-a-Just monotube design is ideal for drivers seeking improved handling, reduced body roll, and enhanced steering response without sacrificing ride comfort. The high-pressure gas charge and floating piston technology work together to automatically adapt damping characteristics based on driving demands, making this shock an excellent choice for performance-oriented vehicles and demanding driving conditions.

Products specifications

Fits

2011-2025 Chevrolet Silverado 2500 HD; 2011-2020 Chevrolet Silverado 3500 HD; 2011-2024 GMC Sierra 2500 HD; 2011-2020 GMC Sierra 3500 HD

FEATURE AND BENEFIT 1

ADDS UP TO 25% MORE DAMPING PERFORMANCE OVER ORIGINAL EQUIPMENT SHOCKS

Compressed Length

16.14

Extended Length

25.31

Stroke Length

9.17

Feature and Benefit 2

COMPONENTS AND VALVING DESIGNED SPECIFICALLY FOR GM TRUCKS

Lower Mount Type

E2(14.6X42)

Upper Mount Type

E2(14.6X42)

Feature and Benefit 7

ELECTRONIC SAFETY SYSTEMS DEPEND ON THE SUSPENSION, BRAKES AND TIRES OPERATING AS THE VEHICLE MANUFACTURER INTENDED. THE KYB GAS-A-JUST HELPS KEEP ELECTRONIC SAFETY SYSTEMS PERFORMING AS DESIGNED.

Feature and Benefit 5

FLUID LEAKING CAN BE A CAUSE OF SHOCK FAILURE, THE KYB GAS-A-JUST HAS AN ULTRA-SMOOTH TRIPLE CHROME PLATED CHROME PISTON ROD TO REDUCE SEAL WEAR

Feature and Benefit 3

GAS-A-JUST MONOTUBES INCLUDE ADDITIONAL DAMPING OVER OE DESIGN FOR VEHICLES THAT WORK, TOW, AND HAVE LARGER, HEAVIER TIRES & WHEELS

Feature and Benefit 4

HIGH PRESSURE MONOTUBE DESIGN SEPARATES THE GAS AND OIL FOR FADE FREE OPERATION AND INSTANT RESPONSE

B-stop

N

R-stop

N

Feature and Benefit 6

THE HIGHER GAS PRESSURE OF THE KYB GAS-A-JUST RESPONDS QUICKLY TO IMPROVE STEERING RESPONSE

Dust Cover Included

Y

Internal Rebound Spring

N

Quick & easy! Great pricing!!

Nice and easy, thank you

Autoplicity has the cheapest prices around and fast shipping. I will do business with them again in the future.

Great prices on quality replacement parts

quick and easy! almost forgot-great prices!!

Great place to order

Found what I needed at an unbeatable price, easy purchase! No issues

Great site has alot of items in stock. Shipped promptly! Can't wait to do buisiness again.

great so far

good

Very easy to place order

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