King SPR375-16-650 Coilover Coil Spring 3.75in ID 16in Length 650 lb/in Rate

The King Shocks SPR375-16-650 is a heavy-duty coilover coil spring engineered specifically for off-road performance applications. Featuring a 3.75-inch internal diameter, 16-inch free length, and a 650 lb/in spring rate, this spring is purpose-built to work with King's 3.0-inch coilover shock bodies.

King coil springs are manufactured to exacting standards in the USA using high-tensile, chrome silicon wire—the same premium material found in King's race-proven suspension systems. Coil ends are closed and ground flat to ensure consistent, true deflection under load with no rocking or misalignment.

Key Features:

• Internal Diameter: 3.75 inches — designed to fit King 3.0-inch coilover shocks
• Free Length: 16 inches
• Spring Rate: 650 lbs per inch (linear rate)
• Manufactured in the USA to King Shocks specifications
• High-tensile chrome silicon wire construction for maximum durability and fatigue resistance
• Closed and ground ends for flat seating and true deflection
• Powder coated finish for corrosion resistance
• Specifically wound for off-road use — not a repurposed automotive spring

King Shocks spring rates are developed through extensive real-world testing across all types of terrain, from desert racing to rock crawling. The 650 lb/in rate is a firm, high-load option suited for heavily built or ballasted off-road vehicles. King's broad spring lineup allows tuners and builders to dial in the exact spring rate needed for optimal ride quality and control.