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 : cca932-16 Description : Hi-Tech Oval Track Valve Springs; 16 Pieces Title : 932-16 Valve Springs, 1.560" NASCAR California Proposition 65 : WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov Coil Bind Height : 1.16 Compatible .570" Guide Diameter Spring Seats : 4772-16 Compatible .630" Guide Diameter Spring Seats : 4773-16 Compatible Retainer : 748-16 Compatible Shims : 4757 Compatible Spring Cup (O.D. Locator) : 4700-16 Damper : Yes Inner Spring Inside Diameter : 0.749 Number of Springs : 2 Outer Spring Inside Diameter : 1.143 Outer Spring Outside Diameter : 1.557 Seat Height : 2 Seat Pressure : 196 Spring Rate : 452 Inside Diameter(in) : 0.75 Outside Diameter(in) : 1.56 Coil Bind Height(in) : 1.09 Camshaft Type : Hydraulic Installed Height(in) : 2 Open Pressure(lbs) : 513 Spring Type : Double Open Height(in) : 1.375 Position : N/A Installed Pressure(lbs) : 200 Spring Rate(lbs/in) : 481 Engine Components::Valve Springs, Retainers