C/O Spring - 4.10 ID x 10 350# Silver P/C

The QA1 Coil-Over Spring – 4.10 ID x 10 in, 350 lb/in Silver Powder Coat is a precision-engineered suspension component designed for serious performance enthusiasts and fabricators building custom coil-over systems. This spring is ideal for modified vehicles where factory suspension geometry has been altered, making it suitable for street rods, drag cars, and road course machines.

Engineered by QA1, a trusted name in suspension manufacturing, this coil-over spring features a 4.10-inch inner diameter that fits industry-standard coil-over bodies. With a spring rate of 350 pounds-per-inch, it provides firm damping without excessive harshness, while the 10-inch free length accommodates adjustable coil-over shock bodies across various mounting platforms. The silver powder-coat finish enhances durability and corrosion resistance, making it suitable for harsh underbody environments.

This spring is perfect for builders and tuners installing custom coil-over kits on sports cars, muscle cars, and competition vehicles where precise spring selection is crucial. Its balanced stiffness minimizes body roll during cornering while maintaining comfort for daily driving on uneven pavement, making it an excellent choice for street-legal performance builds.