🚗 2-Pack: MOOG 8594 Constant Rate Front Coil Springs
Restore your vehicle’s original handling and ride height with this 2-pack of MOOG 8594 Constant Rate Coil Springs. These premium replacement springs are 100% load-tested and precision-engineered to return your suspension to its factory specifications.
Designed specifically for rear-wheel drive (RWD) Ford and Mercury passenger cars from the late 70s through the early 2000s, these springs provide the structural support necessary to prevent sagging, ensure proper alignment, and reduce premature tire wear.
Key Features
Constant Rate Design: Unlike variable-rate springs, these maintain a consistent spring rate (383 lbs/in) throughout compression, providing predictable handling and a stable, “like-new” feel.
Precision Engineering: Manufactured using high-quality steel and finished with a corrosion-resistant black coating to withstand harsh road conditions and prevent rust.
100% Load Tested: Each spring is tested to ensure it meets strict performance standards for dependable operation and long life.
Easy Installation: Designed as a direct OE replacement, these springs feature squared and tangential ends to fit perfectly into the original spring seats without modification.
Improved Alignment: New springs restore proper ride height, which is essential for maintaining correct wheel alignment and preventing uneven tire wear.
Technical Specifications
| Specification | Details |
| Brand | MOOG |
| Model Number | 8594 (Set of 2) |
| Position | Front |
| Spring Type | Constant Rate |
| Spring Rate | 383 lbs / inch |
| Free Height | 14.94 Inches |
| Inside Diameter | 3.50 Inches |
| Bar Diameter | 0.62 Inches |
| Finish | Black Powder Coated |
Vehicle Fitment Guide
The MOOG 8594 is a highly versatile part fitting several classic and modern-classic Ford/Mercury platforms:
Ford Mustang: 1979–1989, 1991–2004 (including GT, LX, and Cobra models)
Ford Fairmont: 1978–1981
Ford Granada: 1981–1982
Ford LTD: 1983–1986
Mercury Capri: 1979–1986
Mercury Marquis: 1983–1986
Mercury Zephyr: 1978–1981
Installation Tip
When replacing coil springs, it is highly recommended to inspect your spring insulators and shocks at the same time. Worn insulators can cause squeaking or popping noises, while old shocks may not be able to control the rebound of your new, stiff springs effectively.
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