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KYB KG4503 Gas-a-Just Gas Shock

Free shipping on orders over $29.99

$37.72

$ 18 .99 $18.99

In Stock

About this item

  • Adds up to 25% more damping performance over original equipment shocks
  • Components and valving designed specifically for classic muscle cars
  • High gas pressure design provides instant, extra control
  • monotube design outperforms all other standard shock absorbers
  • Unique, air-free, hydraulic unit eliminates performance fade


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.


Scott C.
Reviewed in the United States on April 19, 2022
No problems installing. Improved ride quality a lot.
Dad of All Trades
Reviewed in the United States on July 25, 2021
This is a perfect fit for the 1954 Hudson Hornet. Installed without any modifications. Since I’m doing other work & the car is not driveable I’ll update when I do drive it. Assuming Amazon allows the review to be updated.I can say that compared to the Monroe shocks it replaced these appear to be a much higher quality shock. Why? 1) they have a full steel cover for the rod unlike Monroe, which protects from damage to the rod & subsequent internal seals. 2) they included 2 nuts for each mounting point, thus preventing an unexpected loosening of the one nut at each mounting point the Monroe’s came with. Additionally I used the KYB app to check the compressed & extended lengths as well as listed applications & cross referencing of other shock numbers. Definitely a very good app.The only down side is the instructions are a weird array of photos & no written words.
Glitterbug
Reviewed in the United States on June 22, 2021
These do not fit a '55 Mercury, sent back with authorization, awaiting refund.
Bill
Reviewed in the United States on March 18, 2021
Good shocks. Stiffer than OE. Great for a heavy car. They lifted the front of my ‘61 TBird slightly.
D Hauke
Reviewed in the United States on August 29, 2019
fit fine on my AMX
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