1979-93 Mustang KYB Gas-A-Just Rear Shock by KYB

Mustang KYB Gas-A-Just Rear Shock (79-93)

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KYB Mustang Gas-A-Just Rear Shock (79-93) KG5551

Get your 1979-1993 Mustang's suspension back into shape with these Gas-A-Just KYB rear shocks from LMR!

Item #KYB-KG5551
MPN# KG5551

Everyday Low Price: $47.99

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  • OE Style Replacement Shock
  • Improves Handling


  • Monotube Design
  • White Finish
  • Sold As Each

What's in the Box

  • 1 KYB Rear Shock
  • Installation Instructions

Product Description

All KYB struts and shocks carry a LIMITED LIFETIME warranty.

Gas-A-Just shocks are non-adjustable high-pressure gas shock absorbers that are designed to deliver driving control and performance by keeping the tires glued to the road. These high strength, monotube shock absorbers provide extra-rugged durability and fade-free performance.

When you want more road control when towing or for higher performance, you want KYB Gas-A-Just shock absorbers. Sometimes specified for use on the rear axle in conjunction with GR-2 strut cartridges or complete struts on the front axle.


1. Upgrade
Vehicles are generally designed to handle a broad range of purposes: Passenger ride comfort on one side, load and terrain capabilities on the other. When your typical use of a vehicle sometimes or always stresses heavier loads, top heavy, towing or off-road conditions, you may want to consider replacing the shocks with units that exceed original equipment capabilities. KYB offers many higher-performing “Monotube” shocks for this purpose.

2. Maintenance
Even on well paved roads the shocks can move up or down 1,500 to 1,900 times every mile: In 50,000 miles that can exceed 75 million cycles. Over time, performance tends to decrease gradually and the motorist usually doesn’t realize how much handling and control is lost. Replacing shocks and struts after 50,000 miles can keep the vehicle performing as well as it was designed and extend its life expectancy.

3. Ride Control Conditions-Based
Worn shocks and struts eventually causes ride control conditions to worsen to a degree that impairs the drivers ability to control the vehicle. Road testing and vehicle inspections by a qualified technician every 12,000 miles is recommended to identify and keep the motorist informed about these conditions.

4. Repair of Failed Units
Shock or strut failures are a driving safety hazard. If you can’t control your vehicle, then it controls you. Evidence of failures includes things like; excessive bounce, units leaking to the point of fluid dripping, tires that are cupping and visual component damage.

KYB Warranty - Click Here

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Customer Photos (1)

Product Reviews (10)

out of 5 stars
5 stars
10 reviews
5 stars    9
4 stars    1
3 stars    0
2 stars    0
1 star    0

10 of 10 REVIEWS
10 of 10 REVIEWS

5 Stars   Economical upgrade
By on 9/9/2014
Shocks are suggested to be replaced at 50,000 miles, but let's face it... this is one of the most neglected parts when it comes to maintaining a vehicle. That being said, when I bought my car with about 100,000 miles on it, the shocks were all original. KYB offers a solid shock, that in my opinion, is superior to the OEM (I won't call out that brand). What is nice about these, is that they are monotubes, which are an upgrade from the stock twin-tube shocks that came from the factory. The few extra bucks spent on the monotubes alone is worth the upgrade, as these are far less prone to cavitation, if any.

I want to note how the ride is, since that is what a lot of people are looking to find out. They pretty much restored the ride quality, if not upgraded it, to/from what it was from the factory. I can't think of much more to say about a shock, other than it is better than a twin-tube by a long shot.

Yes, I would recommend this item to a friend!

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5 Stars   For the price, you can't beat it.
By on 3/4/2014
Both of my rear shocks where shot when i bought the car. I wasn't sure which way i was gonna go with the suspension, so I got these just to fix the problem. Now, I plan on keeping them! Installation is a breeze and if you're like me and replacing the factory shocks, you get to see how dramatically different (and better) the hardware is. I'm definitely going KYB in the front now and with all my mustang parts, will only order them from LRS.

Yes, I would recommend this item to a friend!

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5 Stars   The sag is gone
By on 7/2/2014
Thanks to Latemodel Restoration I'm refreshing my 88GT after years of inattention. The site makes it easy to find parts I didn't know I needed, and these shocks (I'm sorry to say) are the first suspension parts to be replaced in 26 years. Struts are next!

Yes, I would recommend this item to a friend!

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5 Stars   Amazing!
By on 7/27/2014
Image uploaded by Alexander A. Easy installation! These shocks are amazing and really tightened up the suspension, I redid the entire suspension and these KYBs went well with my setup.

Yes, I would recommend this item to a friend!

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5 Stars   Good upgrade
By on 9/10/2014
Replaced the worn shocks with these ride and handling big improvement

Yes, I would recommend this item to a friend!

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4 Stars   Nice
By on 12/8/2014
What a difference in the ride

Yes, I would recommend this item to a friend!

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5 Stars   Works great!
By on 2/25/2015
Need a cheap set of replacements to breathe some life into ailing suspension? Look no further! My 91 LX's suspension was worn and going over bumps was God awful. I got these along with SVE rear control arms (bought control arms used) and what a difference!! I was a little skeptical these would really help, but for some consultation, I could depress my old shocks (stock Motorcraft) with one arm, without leaning on it, and I can only bench like 125lbs (I'm weak). The new shock I have to use both hands and lean on it (I weigh 150lbs) to get it to go down! I will definitely recommend this to anyone that looks for replacement shocks, and am looking into seeing if these are compatible with a 1991 crown vic.

Yes, I would recommend this item to a friend!

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5 Stars   great value, super happy
By on 5/7/2015
i bought this item to spruce up my worn suspension....wow was i impressed

Yes, I would recommend this item to a friend!

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5 Stars   looks great
By on 8/19/2015
Other than stock bolts not fitting the're great

Yes, I would recommend this item to a friend!

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5 Stars   Great shock
By on 2/6/2015
Excellent replacement of the old factory shocks

Yes, I would recommend this item to a friend!

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Vehicle Applications

Ford Mustang - 1979 (79) - 1980 (80) - 1981 (81) - 1982 (82) - 1983 (83) - 1984 (84) - 1985 (85) - 1986 (86) - 1987 (87) - 1988 (88) - 1989 (89) - 1990 (90) - 1991 (91) - 1992 (92) - 1993 (93)

About This Brand

KYB - World Class Shocks & Struts
KYB manufactures and markets a full line of Mustang & LIghtning shocks and struts for replacement, upgrade and performance applications. The KYB line includes GR-2® Premium Shocks and Struts, Gas-a-Just® High Performance Shocks, MonoMax™ Heavy Duty Shocks, AGX® Sport Adjustable Shocks and Struts, strut mounts and boots.

KYB uses its innovative design and advanced engineering to produce state-of-the-art shocks and struts that are recognized worldwide for their proven reliability and superior ride control. There is no comparison when it comes to KYB and other shocks and struts. Unlike other manufacturers, KYB inspects the quality of each and every part. That means fewer comebacks, more satisfied customers and a limited lifetime warranty rate that averages less than one percent.

KYB is the world’s largest supplier of shocks and struts to vehicle manufacturers. KYB produces a variety of ride control products for use as original equipment and replacement parts in automobiles, motorcycles,

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