NexTek Drag Race Valve Springs, 1.650" O.D., 0.855" I.D., 635 lbs./in. Spring Rate, 290 @ 2.000" Installed, 825 @ 1.150" Open, 0.850" Max Valve Lift, 1.105" Coil Bind, Double Spring (No Damper), 16/pkg.|Manley NexTek Drag Race Valve Springs 1.650" O.D.
