Isky Cams 1.570 Valve Springs MGZR 30 gph Free Flow

30 gph Free Flow

and heat out---fresh air in

635 in OD Steps

2cc increments

Not compatible with 1976 Pontiac 400 blocks due to factory notches at the top of cylinders

Isky Cams 1.570 Valve Springs MGZR 30 gph Free FlowProduct 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