Isky Cams SP-Series Dual Valve Spring / Damper - 415 lb/in Spring Rate - 1.160 in Coil Bind - 1.530 in OD - Set of 16 RU004004M Mandatory per NHRARule 8: 4

Mandatory per NHRARule 8: 4

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Isky Cams SP-Series Dual Valve Spring / Damper - 415 lb/in Spring Rate - 1.160 in Coil Bind - 1.530 in OD - Set of 16 RU004004M Mandatory per NHRARule 8: 4Isky Valve Springs are world famous for their reliability and long life. As the world's largest racing, performance, and economy cam manufacturer, Isky maintains a dynamometer testing program for constant improvement of camshaft and valve train design. These tests are conducted daily in Isky's new enlarged dyno facility. To properly evaluate and prove the efficiency of Isky racing cams and valve train components, Isky maintains a continuous engine