The Hyperco Coil Over Spring 2.5In Id 10In Tall is engineered for superior performance in motorsports applications. With a 2.5-inch inner diameter and 10-inch free length, this spring offers a 175 lb/in spring rate, providing optimal support and handling. Constructed from high-quality steel and finished with a durable blue powder coat, it ensures longevity and resistance to corrosion. Designed to fit standard coil-over hardware, this spring maintains consistent free length and installed height, enhancing your vehicle's suspension system.