Isky Cams Dual Valve Spring - 0.960 in Coil Bind - 1.240 in OD - Set of 16 Tap Forged 5140 steel I-Beam connecting

Forged 5140 steel I-Beam connecting rods are an upgrade from O

Standard pressure performance upgrade for the M-54D-S

5/8 in Pilot

They won't shrink

Isky Cams Dual Valve Spring - 0.960 in Coil Bind - 1.240 in OD - Set of 16 Tap Forged 5140 steel I-Beam connectingProduct Description: Valve Spring Dual Spring 250 lb in Spring Rate 0. 960 in Coil Bind 1. 240 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 train components,