COMP Cams Valve Springs, Retainers 26921-1 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. Race Street 1.320" OD Dual Spring; 1.770" Installed Height; 1 Spring COMP Cams Dual Valve Spring, 1.300" OD, 135 lbs 1.770", 400 lbs 1.120", Single Piece COMP Cams Valve Spring 1.300in Gm LS1 Du