Moog 658A Coil Spring Set - Front

Moog Coil Spring Set 658A for Chevrolet Suspension

The Moog 658A coil spring set is engineered to restore suspension performance for Chevrolet Bel Air, Caprice, and Impala models. Designed with precise specifications, this coil spring set ensures consistent ride height and handling characteristics for your vehicle.

• Wire diameter: 0.68 inches (17.40 mm)
• Spring color: Black
• Front and rear spring outside diameter: 5.190 inches
• Free (relaxed) spring length: 16.89 inches (429 mm)
• Compressed spring length: 11.81 inches (300 mm)
• Load capacity: 2052 lbs
• Spring rate: 404 lbs per inch
• Constant rate spring type with tangential end design

Technical Details of Moog 658A Coil Spring Set

This coil spring set features a wire diameter of 0.68 inches, providing the necessary strength and durability for suspension applications. Both front and rear springs share an outside diameter of 5.190 inches, ensuring uniformity in suspension response. The free height of 16.89 inches allows for proper ride height restoration, while the compressed length of 11.81 inches supports effective suspension travel. The springs are designed with a constant rate of 404 lbs per inch, delivering consistent load support throughout compression. Tangential ends on both sides facilitate proper seating and alignment within the suspension assembly. The black finish offers corrosion resistance and a clean appearance.

Compatible Vehicles and Applications

This Moog coil spring set 658A is compatible with the following Chevrolet models:

• Chevrolet Bel Air
• Chevrolet Caprice
• Chevrolet Impala

It is intended for use in suspension systems requiring coil springs with the specified dimensions and load ratings, helping to maintain vehicle stability and ride comfort.

Common Suspension Issues Addressed

• Sagging or lowered ride height due to worn springs
• Uneven or harsh ride quality
• Reduced suspension travel and handling performance
• Noise or binding caused by damaged or fatigued springs
• Restoring proper suspension geometry and load support

Installation Notes and Tips

When installing the Moog 658A coil spring set, ensure the springs are oriented with tangential ends properly seated in the spring perches. Verify that the compressed and free lengths match the vehicle specifications to avoid suspension binding or improper ride height. It is recommended to inspect related suspension components such as shocks and mounts during installation for optimal performance.

Quality Assurance and Warranty

Moog coil springs are manufactured to meet or exceed OEM specifications, providing reliable performance and durability. While specific warranty details are not provided, Moog products typically undergo rigorous quality control to ensure consistency and longevity in suspension applications.