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KYBPart #: KG4521
KYB KG4521 Drive Axle Shaft Damper - Front
⚙️ 47 vehicles fit this part
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✅OE Direct Replacement — Bolt-on fit, no modifications needed
📦Gas-a-just, N/A
🚗Fitment: Ford, Mercury, and Volkswagen, Mustang, Thunderbird, Cougar, Capri, Transporter, Campmobile, Fastback, Squareback, Beetle, and Karmann Ghia
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Overview of KYB Gas-a-just Drive Axle Shaft Damper KG4521
The KYB Gas-a-just Drive Axle Shaft Damper KG4521 is engineered to provide reliable vibration damping for select Ford, Mercury, and Volkswagen vehicles. Designed specifically for models such as the Ford Mustang, Mercury Cougar, and Volkswagen Beetle, this damper helps maintain driveline stability and smooth operation.
- Compressed Length: 10.55 inches
- Extended Length: 16.26 inches
- Stroke Length: 5.71 inches
- Lower Mount Type: E2 (12x32)
- Upper Mount Type: E2 (12x32)
- Includes Dust Cover for protection
- No internal rebound spring
- No B-stop or R-stop features
About the KYB Gas-a-just Product Line
The Gas-a-just line from KYB focuses on gas-charged dampers designed to improve vehicle handling and driveline performance. This product line emphasizes precise damping control and durability, making it suitable for drive axle shaft applications where consistent vibration absorption is critical. The KG4521 damper is part of this line, offering a balance of length and stroke specifications tailored for specific Ford, Mercury, and Volkswagen models.
Technical Description and Specifications
The KG4521 drive axle shaft damper features a compressed length of 10.55 inches and an extended length of 16.26 inches, providing a stroke length of 5.71 inches. Both the upper and lower mounts use the E2 (12x32) type, ensuring secure and compatible installation. The included dust cover protects internal components from debris and contaminants, extending the damper's service life. This model does not include an internal rebound spring or B-stop and R-stop features, focusing on straightforward damping performance.
Applications and Problem Solving
- Reduces driveline vibrations in Ford Mustang and Mercury Cougar vehicles
- Minimizes axle shaft noise and harshness in Volkswagen Beetle and Capri models
- Improves overall driveline stability for Ford Thunderbird and Mercury Cougar
- Helps prevent premature wear of axle components due to vibration
- Maintains smooth power transfer and vehicle handling
Installation Notes and Tips
When installing the KYB Gas-a-just KG4521 damper, ensure the E2 (12x32) mounts are properly aligned to avoid mounting stress. The included dust cover should be inspected for damage before installation to maintain protection against dirt and moisture. This damper is designed for direct replacement on compatible Ford, Mercury, and Volkswagen models, including the Mustang, Cougar, Beetle, Capri, and Thunderbird. Proper torque specifications should be followed according to vehicle manufacturer guidelines.
Quality Assurance and Warranty
KYB products, including the Gas-a-just KG4521 drive axle shaft damper, are manufactured to meet strict quality standards. Each unit undergoes rigorous testing to ensure durability and performance under normal operating conditions. While specific warranty details are not provided here, KYB typically offers coverage against defects in materials and workmanship. Refer to KYB documentation for exact warranty terms.
| Brand | KYB |
| Part Number | KG4521 |
| Position | Gas-a-just, N/A |
| Compressed Length | 10.55 |
| Dust Cover Included | Y |
| Extended Length | 16.26 |
| Lower Mount Type | E2(12X32) |
| Stroke Length | 5.71 |
| Upper Mount Type | E2(12X32) |
This part fits 47 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2002 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 2001 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 2000 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1999 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1998 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1997 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1996 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1995 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1994 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1993 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1992 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1991 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1990 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1989 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1988 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1988 | Ford | Thunderbird | N/A | 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).; Gas-a-just | ||
| 1988 | Mercury | Cougar | N/A | 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).; Gas-a-just | ||
| 1987 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1987 | Ford | Thunderbird | N/A | 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).; Gas-a-just | ||
| 1987 | Mercury | Cougar | N/A | 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).; Gas-a-just | ||
| 1986 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1986 | Ford | Thunderbird | N/A | 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).; Gas-a-just | ||
| 1986 | Mercury | Capri | N/A | 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).; Gas-a-just | ||
| 1986 | Mercury | Cougar | N/A | 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).; Gas-a-just | ||
| 1985 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1985 | Ford | Thunderbird | N/A | 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).; Gas-a-just | ||
| 1985 | Mercury | Capri | N/A | 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).; Gas-a-just | ||
| 1985 | Mercury | Cougar | N/A | 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).; Gas-a-just | ||
| 1984 | Ford | Mustang | N/A | 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).; Gas-a-just | ||
| 1984 | Ford | Thunderbird | N/A | 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).; Gas-a-just | ||
| 1984 | Mercury | Capri | N/A | 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).; Gas-a-just | ||
| 1984 | Mercury | Cougar | N/A | 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).; Gas-a-just | ||
| 1966 | Volkswagen | Beetle | 1.2L | H4 | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just |
| 1965 | Volkswagen | Beetle | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just | ||
| 1964 | Volkswagen | Beetle | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just | ||
| 1963 | Volkswagen | Beetle | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just | ||
| 1962 | Volkswagen | Beetle | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just | ||
| 1961 | Volkswagen | Beetle | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just | ||
| 1960 | Volkswagen | Beetle | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just | ||
| 1959 | Volkswagen | Beetle | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just | ||
| 1958 | Volkswagen | Beetle | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just | ||
| 1957 | Volkswagen | Beetle | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just | ||
| 1956 | Volkswagen | Beetle | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just | ||
| 1955 | Volkswagen | Beetle | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just | ||
| 1954 | Volkswagen | Beetle | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just | ||
| 1953 | Volkswagen | Beetle | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just | ||
| 1952 | Volkswagen | Beetle | Front | Install a monotube shock absorber to enhance performance.; Gas-a-just |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
32355
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.