Single Outer Valve Springs from COMP Cams allow you to build the perfect spring assembly for your application. The valve spring creation process is far more involved than most people realize. Selecting the right metal stock and creating the best design is not done by chance. COMP Cams has developed a process that creates the highest quality valve spring available. The result is a product that meets and exceeds the expectations of today’s engine builders and racers. PartNumber : cca990-16 Description : Single Outer Valve Springs; 16 Pieces Title : 990-16 Valve Springs, 1.437" Outer w/Damper California Proposition 65 : WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov Coil Bind Height : 0.95 Compatible Retainer : 744-16 Compatible Shims : 4754 Compatible Spring Cup (O.D. Locator) : 4704-16 Damper : No Number of Springs : 1 Outer Spring Inside Diameter : 1.073 Outer Spring Outside Diameter : 1.437 Seat Height : 1.5 Seat Pressure : 113 Spring Rate : 269 Installed Pressure(lbs) : 105 Open Height(in) : 1.15 Open Pressure(lbs) : 199 Installed Height(in) : 1.5 Spring Rate(lbs/in) : 269 Spring Type : Single Camshaft Type : Mechanical Coil Bind Height(in) : 0.95 Position : Outer Inside Diameter(in) : 1.073 Outside Diameter(in) : 1.437 Engine Components::Valve Springs, Retainers