COMP Cams Valve Springs, Retainers 26925-12 COMP Cams Dual Valve Springs for street/strip 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. Dual Valve Springs, .660" Lift , 1.320"OD COMP Cams Dual Valve Springs, 1.320" OD, 141 lbs 1.810", 405 lbs 1.150", Set of 12 COMP Cams Dual Valve Springs .660in Lift