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 : cca935-1 Description : Hi-Tech Oval Track Valve Springs; Single Piece Title : 935-1 Valve Spring, NASCAR Spring Rate(lbs/in) : 471 Coil Bind Height(in) : 1.18 Open Height(in) : 1.25 Camshaft Type : Mechanical Installed Height(in) : 1.95 Outside Diameter(in) : 1.554 Position : N/A Spring Type : Double Open Pressure(lbs) : 524 Inside Diameter(in) : 0.746 Installed Pressure(lbs) : 194 Engine Components::Valve Springs, Retainers