# KYB KG4511 KYB Gas A Just shock absorber for 1974–1978 Ford Mustang II

### Performance Overview

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.

### Key Features

-   Adds up to 25% more damping performance over original equipment shocks
-   Components and valving designed specifically for classic Ford cars
-   Gas-a-Just monotubes include additional damping over OE design for vehicles that work, tow, and have larger, heavier tires & wheels
-   High pressure monotube design separates the gas and oil for fade free operation and instant response
-   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
-   The higher gas pressure of the KYB Gas-a-Just responds quickly to improve steering response
-   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.
-   Adjustable: No
-   Bearing Plate Included: No
-   Body Diameter: 39.2 mm
-   Boot Included: No
-   Coil Over Springs Included: No
-   Compressed Length: 8.58 in
-   Design: Monotube
-   Dust Shield: Yes
-   Extended Length: 10.82 in
-   Gas Charged: Yes
-   Lower Mount Type: Eyelet
-   Lower Mounting Isolator Included: No
-   Manufacturer Part Number: KG4511
-   Stroke Length: 2.24 in
-   Upper Mount Type: Stud
-   Upper Mounting Isolator Included: No
-   VMRS Code: 16003000

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

1974

Ford

Mustang II

1975

Ford

Mustang II

1976

Ford

Mustang II

1977

Ford

Mustang II

1978

Ford

Mustang II

1971

Ford

Pinto

1972

Ford

Pinto

1973

Ford

Pinto

1974

Ford

Pinto

1975

Ford

Pinto

1976

Ford

Pinto

1977

Ford

Pinto

1978

Ford

Pinto

1979

Ford

Pinto

1980

Ford

Pinto

1975

Mercury

Bobcat

1976

Mercury

Bobcat

1977

Mercury

Bobcat

1978

Mercury

Bobcat

1979

Mercury

Bobcat

1980

Mercury

Bobcat

### FAQ

**Will this fit my vehicle?**  
Please verify your year, make, model, position, and any fitment notes using the compatibility table above before purchase.

**What part number is this?**  
The listed part number is KG4511.

**Is this product designed for direct replacement?**  
Yes. This product is intended to match the compatible vehicle applications listed in the fitment table.

**Should I confirm fitment before ordering?**  
Yes. Always compare your original part, position, and vehicle details with the fitment table before ordering.

### Common Searches

-   Shock Absorber for Ford Mustang II
-   KG4511 fitment
-   KYB Shock Absorber
-   1974–1978 Ford Mustang II Shock Absorber
-   KYB KG4511 replacement

## Details

- **Price:** 145.19 CAD
- **Vendor:** KYB
- **Type:** Shock Absorber
- **Tags:** 1971–1980 Ford Pinto, 1974–1978 Ford Mustang II, 1975–1980 Mercury Bobcat, Gas Charged, KG4511, KYB, OE Replacement, Shock Absorber, Suspension

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 145.19 CAD | In stock |

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/kyb-shock-absorber-kg4511)
> Updated: 2026-07-06