The Eibach Conventional Rear Spring enhances racing suspension with a 250 lbs/in rate. Measuring 11.00 inches long with a 5.00-inch outer diameter, this single high-tensile steel spring is designed for universal rear suspensions in race vehicles. Ideal for drag or oval racing, it ensures consistent response. Professional installation and tuning are required. Powder-coated for durability, it includes a limited lifetime manufacturer warranty.