Isky Cams Valve Springs (Blue-Orange/Yellow) - Dual w/ Damper (Hydraulic Cams) - 1.005"-1.430" O.D., .730"-1.070" I.D. H764001XS 1984-1990 GMC P4500

1984-1990 GMC P4500

They have 20% more exhaust flow than cast iron Vortec heads

Howe Adjustable Rate Sway Bars

05 in Long

75 in Thick

Isky Cams Valve Springs (Blue-Orange/Yellow) - Dual w/ Damper (Hydraulic Cams) - 1.005"-1.430" O.D., .730"-1.070" I.D. H764001XS 1984-1990 GMC P4500Isky 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