King SPR425-22-600 4.25" ID Coilover Spring 22" Length 600 lb Rate

The King SPR425-22-600 is a high-performance coilover spring designed for serious off-road applications. This single-rate coil spring features a 4.25-inch internal diameter, 22-inch free length, and 600 lb per inch spring rate, making it ideal for 3.5-inch diameter shock bodies on trucks, UTVs, and race vehicles that demand precise suspension tuning.

Premium Construction:

• Manufactured in the USA from high-tensile chrome silicon wire
• Closed and ground ends sit flat and deflect true under compression
• Powder-coated in King's signature blue finish for corrosion resistance
• Specifically wound for off-road use, not repackaged automotive springs

Race-Proven Performance:

• Spring rates, wire diameters, and coil lengths developed through extensive real-world testing
• Battle-tested in extreme conditions from Baja to Dakar racing
• Linear compression rate provides predictable suspension response
• Compatible with King shocks and other brands of coilover suspension systems

Technical Specifications:

• Internal Diameter: 4.25 inches
• Free Length: 22 inches
• Spring Rate: 600 lbs per inch
• Fits: 3.5" diameter coilover shock bodies

Backed by King's lifetime warranty against sagging and breakage to the original purchaser. This universal spring can be used as a single-rate setup or combined with additional springs for sophisticated dual-rate configurations using secondary travel stops for non-linear suspension characteristics.