The Eibach Bump Spring enhances suspension performance with a 150 lbs/in rate. Measuring 2.25 inches long with a 1.36-inch inner diameter, this single high-tensile steel spring prevents bottoming in universal race or street setups. Ideal for moderate-impact loads, it ensures progressive damping. Professional installation and tuning are required. Powder-coated for durability, it includes a limited lifetime manufacturer warranty.