King SPR375-105-400 Off-Road Coil Spring 3.75" ID 10.5" Length 400 lb Rate

The King SPR375-105-400 is a high-performance coil spring engineered specifically for off-road suspension applications. This spring features a 3.75-inch inside diameter, 10.5-inch free length, and a 400 lb/inch spring rate, making it ideal for coil-over shock applications requiring precise suspension tuning.

Key Features:

• Manufactured in the USA from premium high-tensile chrome silicon wire
• 3.75-inch inside diameter fits 3.0-inch outside diameter coil-over shocks
• 10.5-inch free length with 400 lb per inch spring rate
• Closed and ground ends to sit flat and deflect true under compression
• Spring rate etched on top for easy identification after hard use
• Designed through extensive real-world testing on various terrain types
• Compatible with King and other brands of coil-over shocks
• Lifetime warranty against sagging and breakage to original purchaser

King coil springs are purpose-built for off-road use, not repackaged automotive springs. Each spring is precision-wound to exacting specifications, ensuring consistent performance and durability whether you're racing in Baja or tackling challenging trails. The spring rate of 400 lbs per inch means it takes 400 pounds of force to compress the spring one inch, providing predictable linear compression characteristics for superior suspension control.