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 : cca935-16 Description : Hi-Tech Oval Track Valve Springs; 16 Pieces Title : 935-16 Valve Springs, NASCAR Inside Diameter(in) : 0.746 Coil Bind Height(in) : 1.18 Camshaft Type : Hydraulic Open Height(in) : 1.25 Spring Rate(lbs/in) : 471 Spring Type : Double Installed Pressure(lbs) : 194 Outside Diameter(in) : 1.554 Open Pressure(lbs) : 524 Position : N/A Installed Height(in) : 1.95 Engine Components::Valve Springs, Retainers