Isky Cams Valve Springs (Yellow) - Outer w/ Damper (Hydraulic Cams) - 1.260" O.D., .886" I.D., 115 lbs. @ 1.700" Seat Pressure, 268 lbs. @ 1.210" Open Pressure, 310 Rate Per Inch, 1.160" Coil Bind, .490" Max Lift Thread Locker / Sealer Manifold and controller software updates

Manifold and controller software updates provided over the air via free mobile app

2-3/4" Wider Than Stock

Plain Black Center

Push-Button

1981-1981 Plymouth PB150

Isky Cams Valve Springs (Yellow) - Outer w/ Damper (Hydraulic Cams) - 1.260" O.D., .886" I.D., 115 lbs. @ 1.700" Seat Pressure, 268 lbs. @ 1.210" Open Pressure, 310 Rate Per Inch, 1.160" Coil Bind, .490" Max Lift Thread Locker / Sealer Manifold and controller software updatesIsky 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