Isky Cams 1.570 Valve Springs RS003C0813 1981-1992 Ford F-250

1981-1992 Ford F-250

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Isky Cams 1.570 Valve Springs RS003C0813 1981-1992 Ford F-250Product Description: Valve Spring RAD 9000 Dual Spring Damper 570 lb in Spring Rate 1. 130 in Coil Bind 1. 570 in OD Set of 16 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