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 : cca988-12 Description : Dual Valve Spring Assemblies; 12 Pieces Title : 988-12 Valve Springs, 1.400" 2 Spring Assembly Position : Exhaust Or Intake Outside Diameter(in) : 1.384 Spring Rate(lbs/in) : N/A Camshaft Type : Hydraulic Installed Height(in) : 1.6 Installed Pressure(lbs) : 125 Coil Bind Height(in) : 1 Inside Diameter(in) : N/A Open Height(in) : 1 Open Pressure(lbs) : N/A Spring Type : Double Engine Components::Valve Springs, Retainers