single valve springs - heavy duty - M10 Performance/Race These HD Single Valve springs are perfectly suited for use on a street hot-rod engine running either a 292' or 284' camshaft. They are 45% stiffer than stock springs. Many dual valve springs are too stiff for street performance putting more than necessary pressure on the camshaft resulting in accelerated wear. Sold in a set of 8 pcs. Price: $89.19   Quantity to Add:   CONTACT US AT BMWSALES@2002AD.COM 1-800-4-2002AD 909-629-1955 outside of the USA COPYRIGHT © 2002 AD, ALL RIGHTS RESERVED.