Manley 221424-16: NexTek Drag Race Valve Springs 1.640" O.D.
1.640'' O.D. Double Valve Springs
NexTek Drag Race Valve Springs 1.640'' O.D. 0.860'' I.D. 647 lbs./in. Spring Rate 250 @ 2.000'' Installed 800 @ 1.150'' Open 0.880'' Max Valve Lift 1.070'' Coil Bind Double Spring (No Damper) 16/pkg.