KYB Shocks & Struts Gas-A-Just Quad Shock Ford Mustang 8.8in 79-04 (Exc 99-04 Cobra)

SKU: KYBKG4521

Shocks and Struts

KYB Shocks & Struts Gas-A-Just...

Kyb

KYB Shocks & Struts Gas-A-Just Quad Shock Ford Mustang 8.8in 79-04 (Exc 99-04 Cobra)

SKU: KYBKG4521

Shocks and Struts

KYB Shocks & Struts Gas-A-Just...

Sale ends in Calculating... Fri 16 Oct, 11:09 am AEST

IN STOCK! Est Ship 3-5 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.

We accept

Description

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 KYB Gas-a-just has two separate working chambers: An air-free hydraulic piston and valve area for responsiveness and 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.

Product Overview

KYB Gas A Just shocks High Performance Shocks designed to deliver maximum driving control, KYBs Gas-a-Just High Performance Shocks provide a high performance ride. Gas-a-Just High Performance shocks higher gas pressure keeps tires glued to the road while its superior strength monotube design with floating piston makes for fade-free performance and the seamless cylinders and eye rings provide durability. The Gas-a-Just High Performance Shocks offer a wide range of applications including RVs and motor homes. *Purpose:* Increases performance, stability * Monotube shocks * Delivering additional handling and control compared to twin-tube designs * The newest concept in ride control * The more responsive monotube design automatically adjusts to driving conditions * Ideal as a replacement for an OE monotube or as an upgrade from a twin-tube * Applications for cars, trucks, vans, and SUVs

Features and Benefits

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.

Product Details

B-stop:	N
Bump Stop:	No
Compressed Bump Stop:	No
Compressed Length (in):	10.55
Compressed Length:	10.55
Cover:	Yes
Description:	High Pressure Monotube Gas Shock for Cars and Trucks
Dust Cover Included:	Yes
Extended Length (in):	16.26
Extended Length:	16.26
Internal Rebound Spring:	N
Lower Mount Type:	E2(12x32)
Lower Mount:	E2(12x32)
Part Number:	kybKG4521
Position:	Front
R-stop:	N
Rebound Stop:	No
Stroke (in):	5.71
Stroke Length:	5.71
Upper Mount Type:	E2(12x32)
Upper Mount:	E2(12x32)

Part Type

84-04 Mustang Axle Dampe

Data: v4.2 - Upd: 2026-10-15 09:06:13

Features

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.

Specifications

Product Attributes - Brand: KYB Shocks & Struts
Product Attributes - Manufacturer's Part Number: KG4521
Product Attributes - Part Type: Shocks and Struts
Product Attributes - Product Line: KYB Gas-a-Just Shocks and Struts
Product Attributes - UPC: 781552045212
Product Attributes - Ride Height: Stock
Product Attributes - Internal Design: Monotube
Product Attributes - Adjustable Valving: No
Product Attributes - Gas Charged: Yes
Product Attributes - Boot Included: No
Product Attributes - Remanufactured: No
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: When used in a Quad Shock application: Install with the dust cover to the rear of the vehicle. The spacers (in the box) to the inboard side of the axle and spread bracket slightly.

Reference Information

Brand Name/s	Kyb
StreetFX SKU	kybKG4521
SFX Item ID	4443441
Supplier Item Code	4443441
Manufacturer SKU	KG4521
Manufacturer UPC	781552045212
Alternative References	8.8in

Compatibility

Application Data

Make	FORD
Model	MUSTANG
Submodel	BASE
Beginning Year	1994
Ending Year	2002
Engine Type	V6
Liter	3.8
CID	232
Engine Size	3.8L/232
Engine Family	Ford V6
Drivetrain	RWD
Body Style	Convertible
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	4
Region	USA

Make	FORD
Model	MUSTANG
Submodel	BASE
Beginning Year	1994
Ending Year	2002
Engine Type	V6
Liter	3.8
CID	232
Engine Size	3.8L/232
Engine Family	Ford V6
Drivetrain	RWD
Body Style	Coupe
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	4
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT-350 20TH ANNIVERSARY
Beginning Year	1984
Ending Year	1984
Engine Type	L4
Liter	2.3
CID	140
Engine Size	2.3L/140
Engine Family	Ford 4-cylinder
Drivetrain	RWD
Body Style	Convertible
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	W
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT-350 20TH ANNIVERSARY
Beginning Year	1984
Ending Year	1984
Engine Type	L4
Liter	2.3
CID	140
Engine Size	2.3L/140
Engine Family	Ford 4-cylinder
Drivetrain	RWD
Body Style	Hatchback
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	W
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT-350 20TH ANNIVERSARY
Beginning Year	1984
Ending Year	1984
Engine Type	V8
Liter	5.0
CID	302
Engine Size	5.0L/302
Engine Family	Ford small block Windsor
Drivetrain	RWD
Body Style	Convertible
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	F
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT-350 20TH ANNIVERSARY
Beginning Year	1984
Ending Year	1984
Engine Type	V8
Liter	5.0
CID	302
Engine Size	5.0L/302
Engine Family	Ford small block Windsor
Drivetrain	RWD
Body Style	Convertible
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	M
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT-350 20TH ANNIVERSARY
Beginning Year	1984
Ending Year	1984
Engine Type	V8
Liter	5.0
CID	302
Engine Size	5.0L/302
Engine Family	Ford small block Windsor
Drivetrain	RWD
Body Style	Hatchback
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	F
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT-350 20TH ANNIVERSARY
Beginning Year	1984
Ending Year	1984
Engine Type	V8
Liter	5.0
CID	302
Engine Size	5.0L/302
Engine Family	Ford small block Windsor
Drivetrain	RWD
Body Style	Hatchback
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	M
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT
Beginning Year	1984
Ending Year	1984
Engine Type	L4
Liter	2.3
CID	140
Engine Size	2.3L/140
Engine Family	Ford 4-cylinder
Drivetrain	RWD
Body Style	Convertible
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	W
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT
Beginning Year	1984
Ending Year	1984
Engine Type	L4
Liter	2.3
CID	140
Engine Size	2.3L/140
Engine Family	Ford 4-cylinder
Drivetrain	RWD
Body Style	Hatchback
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	W
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT
Beginning Year	1984
Ending Year	1985
Engine Type	V8
Liter	5.0
CID	302
Engine Size	5.0L/302
Engine Family	Ford small block Windsor
Drivetrain	RWD
Body Style	Convertible
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	F
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT
Beginning Year	1984
Ending Year	1985
Engine Type	V8
Liter	5.0
CID	302
Engine Size	5.0L/302
Engine Family	Ford small block Windsor
Drivetrain	RWD
Body Style	Hatchback
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	F
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT
Beginning Year	1984
Ending Year	1986
Engine Type	V8
Liter	5.0
CID	302
Engine Size	5.0L/302
Engine Family	Ford small block Windsor
Drivetrain	RWD
Body Style	Convertible
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	M
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT
Beginning Year	1984
Ending Year	1986
Engine Type	V8
Liter	5.0
CID	302
Engine Size	5.0L/302
Engine Family	Ford small block Windsor
Drivetrain	RWD
Body Style	Hatchback
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	M
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT
Beginning Year	1987
Ending Year	1993
Engine Type	V8
Liter	5.0
CID	302
Engine Size	5.0L/302
Engine Family	Ford small block Windsor
Drivetrain	RWD
Body Style	Convertible
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	E
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT
Beginning Year	1987
Ending Year	1993
Engine Type	V8
Liter	5.0
CID	302
Engine Size	5.0L/302
Engine Family	Ford small block Windsor
Drivetrain	RWD
Body Style	Hatchback
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	E
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT
Beginning Year	1994
Ending Year	1995
Engine Type	V8
Liter	5.0
CID	302
Engine Size	5.0L/302
Engine Family	Ford small block Windsor
Drivetrain	RWD
Body Style	Convertible
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	T
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT
Beginning Year	1994
Ending Year	1995
Engine Type	V8
Liter	5.0
CID	302
Engine Size	5.0L/302
Engine Family	Ford small block Windsor
Drivetrain	RWD
Body Style	Coupe
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	T
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT
Beginning Year	1996
Ending Year	2002
Engine Type	V8
Liter	4.6
CID	281
Engine Size	4.6L/281
Engine Family	Ford modular V8
Drivetrain	RWD
Body Style	Convertible
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	X
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT
Beginning Year	1996
Ending Year	2002
Engine Type	V8
Liter	4.6
CID	281
Engine Size	4.6L/281
Engine Family	Ford modular V8
Drivetrain	RWD
Body Style	Coupe
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	X
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GT BULLITT
Beginning Year	2001
Ending Year	2001
Engine Type	V8
Liter	4.6
CID	281
Engine Size	4.6L/281
Engine Family	Ford modular V8
Drivetrain	RWD
Body Style	Coupe
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	X
Region	USA

Make	FORD
Model	MUSTANG
Submodel	GTS
Beginning Year	1995
Ending Year	1995
Engine Type	V8
Liter	5.0
CID	302
Engine Size	5.0L/302
Engine Family	Ford small block Windsor
Drivetrain	RWD
Body Style	Coupe
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	T
Region	USA

Make	FORD
Model	MUSTANG
Submodel	L
Beginning Year	1984
Ending Year	1984
Engine Type	L4
Liter	2.3
CID	140
Engine Size	2.3L/140
Engine Family	Ford 4-cylinder
Drivetrain	RWD
Body Style	Coupe
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	A
Region	USA

Make	FORD
Model	MUSTANG
Submodel	L
Beginning Year	1984
Ending Year	1984
Engine Type	L4
Liter	2.3
CID	140
Engine Size	2.3L/140
Engine Family	Ford 4-cylinder
Drivetrain	RWD
Body Style	Hatchback
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	A
Region	USA

Make	FORD
Model	MUSTANG
Submodel	L
Beginning Year	1984
Ending Year	1984
Engine Type	V6
Liter	3.8
CID	232
Engine Size	3.8L/232
Engine Family	Ford V6
Drivetrain	RWD
Body Style	Coupe
Application Notes	Gas-a-just; Axle Damper (Rear Quad Shock), Install KG4521 with the dustcover to the rear of the vehicle, the spacers (in box) to the inboard side of the shock, and the axle mounting bracket spread slightly (1-2mm).
Engine VIN Code	3
Region	USA

Loading compatibility information...

Keep shopping

KYB Shocks & Struts Gas-A-Just Quad Shock Ford Mustang 8.8in 79-04 (Exc 99-04 Cobra)

KYB Shocks & Struts Gas-A-Just Quad Shock Ford Mustang 8.8in 79-04 (Exc 99-04 Cobra)

Description

Product Overview

Features and Benefits

Product Details

Part Type

Features

Specifications

Reference Information

Compatibility

More from Kyb

KYB Shocks & Struts Strut Boots Front & Rear ACURA CSX 2006-10 ACURA Legend 1991-95 ASUNA Sedan SE/G

KYB Shocks & Struts Strut Boots Front & Rear ACURA CL 2001-03 ACURA Legend 1986-95 ACURA RL 1996-04

KYB Shocks & Struts Strut Boots Front & Rear ACURA RDX 2007-11 ASUNA Sunfire 1993-94 AUDI 80/90 Seri

KYB Shocks & Struts Strut Boots Front & Rear ACURA CL 1997-99 ACURA CL 2001-03 ACURA EL 1997-00 ACUR

KYB Shocks & Struts Strut-Plus Rear 05-09 Subaru Outback

KYB Shocks & Struts Strut-Plus Rear 08-10 Mitsubishi Lancer