Moog CS578 Coil Spring Set - Front

Moog CS578 Coil Spring Set Overview

The Moog CS578 coil spring set is engineered to restore suspension performance for select Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac vehicles. Designed with precise dimensions and a durable black finish, this coil spring set offers reliable support and consistent ride height for models like the Caprice, Impala, and DeVille.

• Wire diameter: 0.7 inches (17.86 mm) for strength and durability
• Spring color: Black powder-coated finish for corrosion resistance
• Front and rear spring outside diameter: 5.480 inches
• Free height (relaxed length): 17.5 inches (444.5 mm)
• Spring rate: 357 lbs per inch for balanced ride and handling
• End types: Squared and tangential for proper fitment and seating
• Inner diameter: 4.08 inches (103.63 mm)

Detailed Product Description

The Moog CS578 coil spring set is designed to meet the exact specifications required for suspension restoration on a range of classic and late-model GM vehicles. With a wire diameter of 0.7 inches and a spring rate of 357 lbs per inch, these springs provide the necessary stiffness to maintain proper ride height and suspension geometry under load. The black finish helps protect against rust and wear, extending the service life of the springs. Both front and rear springs share identical dimensions, including a free height of 17.5 inches and an outside diameter of 5.480 inches, ensuring consistent performance across the suspension system. The squared and tangential end types allow for secure mounting and compatibility with OE spring seats.

Compatible Vehicles and Applications

• Buick models such as LeSabre, Riviera, and Electra
• Cadillac models including DeVille, Fleetwood, and Seville
• Chevrolet models like Caprice, Impala, and Malibu
• Oldsmobile models including Cutlass, Delta 88, and 88
• Pontiac models such as Grand Am, Grand LeMans, and Starfire

Common Suspension Issues Addressed

• Sagging or uneven ride height due to worn springs
• Reduced handling stability and poor suspension response
• Excessive body roll during cornering
• Noise or vibration caused by weakened coil springs
• Restoring original suspension geometry after component replacement

Installation Notes and Tips

When installing the Moog CS578 coil spring set, ensure the vehicle is securely lifted and supported. Use appropriate spring compressors to safely remove and install coil springs. Verify that the squared and tangential ends seat properly in the spring mounts to avoid misalignment. It is recommended to inspect related suspension components such as shocks and bushings during installation for optimal performance.

Quality Assurance and Warranty

Moog coil springs are manufactured to meet or exceed OEM specifications, providing consistent performance and durability. While specific warranty details for part number CS578 are not provided, Moog products typically come with a limited warranty against defects in materials and workmanship. Refer to Moog’s official documentation for complete warranty information.