Dual Valve Springs from COMP Cams are manufactured from Super Clean wire and subject to extensive quality control testing to deliver a valve spring assembly with superior strength, durability and valve train stability, no matter what the application. The dual spring design creates a stronger valve spring that can easily handle the increased lift found in extreme stress applications. COMP Cams Dual Valve Springs exceed the expectations of today’s engine builders and racers. PartNumber : cca927-12 Description : Hi-Tech Oval Track Valve Springs; 12 Pieces Title : 927-12 Valve Springs, NASCAR Coil Bind Height(in) : 1.175 Installed Pressure(lbs) : 197 Position : N/A Spring Rate(lbs/in) : 494 Camshaft Type : Hydraulic Inside Diameter(in) : 0.731 Open Height(in) : 1.25 Open Pressure(lbs) : 543 Outside Diameter(in) : 1.539 Spring Type : Double Installed Height(in) : 1.95 Engine Components::Valve Springs, Retainers