Hyperco 18Y0425-9.9 Front Coil Spring 5 Inch ID 9.9 Inch Tall 425 lb/in

The Hyperco 18Y0425-9.9 is a high-performance front coil spring designed for racing and performance suspension applications. This precision-engineered spring features a 5-inch inside diameter and 9.9-inch free length, making it compatible with a wide range of coilover shock systems.

Key Specifications:

• Spring Rate: 425 pounds per inch
• Inside Diameter: 5 inches
• Free Length: 9.9 inches
• Chrome silicon construction for superior durability and resistance to sag
• Precision wound to exact specifications for consistent performance
• Shot-peened for enhanced fatigue life

Hyperco springs are manufactured using premium chrome silicon alloy steel and undergo rigorous quality control processes to ensure consistent spring rates and reliable performance under extreme racing conditions. The 18Y series is specifically designed for front suspension applications where precise handling characteristics are critical.

This spring is ideal for circle track racing, road racing, autocross, and other motorsports applications where suspension tuning is essential for optimal vehicle dynamics and competitive performance.