King SPR375-13-350 Coil Spring 3.75" ID 13" Length 350 lb Rate

The King SPR375-13-350 is a high-performance coil-over spring designed for 3.0" outside diameter shocks used in off-road and racing applications. This coil spring features a 3.75" inside diameter, 13" free length, and a 350 lb/inch spring rate, providing consistent performance for demanding suspension setups.

Key Specifications:

• Inside Diameter: 3.75 inches
• Free Length: 13 inches
• Spring Rate: 350 lbs per inch (linear rate)
• Fits 3.0" outside diameter coil-over shocks
• Universal fitment - compatible with King and other shock brands
• Spring rate etched on top for easy identification

Construction and Quality:

• Manufactured in the USA from high-tensile chrome silicon wire
• Closed and ground ends to sit flat and deflect true
• Specifically wound for off-road applications with real-world tested specifications
• Designed for consistent spring rates, durability, and strength
• Wire diameters and coil lengths developed through extensive terrain testing

King coil springs are engineered for serious off-road use, not repackaged automotive springs. The 350 lb spring rate means it requires 350 pounds of force to compress the spring one inch, with force increasing linearly as compression increases. This spring is backed by King's lifetime warranty against sagging and breakage to the original purchaser.