Hyperco 18Y0475-9.9 Front Coil Spring 5 Inch ID 9.9 Inch Length 475 lb/in

The Hyperco 18Y0475-9.9 is a high-performance front coil spring designed for racing and high-performance street applications. This precision-engineered spring features a 5-inch inner diameter and 9.9-inch free length, providing reliable suspension performance under demanding conditions.

Key Specifications:

• Spring rate: 475 pounds per inch
• Inner diameter: 5 inches
• Free length: 9.9 inches
• Application: Front suspension
• Construction: High-tensile chrome silicon steel wire
• Finish: Precision ground ends for proper seating

Hyperco springs are manufactured to exacting tolerances using premium materials and advanced coiling processes. Each spring is designed to deliver consistent performance with minimal rate degradation over time. The chrome silicon alloy construction provides superior fatigue resistance and durability compared to standard music wire springs, making these ideal for competitive motorsports and aggressive street driving.

This spring is commonly used in coilover suspension systems and can be paired with appropriate shock absorbers for custom suspension setups. The 5-inch ID is compatible with many popular coilover sleeve designs used in circle track, road racing, and performance street applications.