COMP Cams Dual Valve Springs for race applications 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 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 : cca26094-16 Description : Race Valve Springs; 16 Pieces Title : 26094-16 Valve Springs, Stock Late Model California Proposition 65 : WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov Coil Bind Height : 1.2 Compatible .570" Guide Diameter Spring Seats : 4772-16 Compatible .630" Guide Diameter Spring Seats : 4773-16 Compatible Retainer : 749-16 Compatible Shims : 4757 Compatible Spring Cup (O.D. Locator) : 4700-16 Damper : Yes Inner Spring Inside Diameter : 0.742 Number of Springs : 2 Outer Spring Inside Diameter : 1.127 Outer Spring Outside Diameter : 1.564 Seat Height : 1.9 Seat Pressure : 178 Spring Rate : 454 Valve Spring Series : Race Endurance Coil Bind Height(in) : 1.165 Installed Pressure(lbs) : 176 Outside Diameter(in) : OEM Position : N/A Spring Rate(lbs/in) : 445 Camshaft Type : OEM Open Height(in) : 1.3 Open Pressure(lbs) : 441 Inside Diameter(in) : 0.752 Installed Height(in) : 1.9 Spring Type : Double Engine Components::Valve Springs, Retainers