Isky, Tool Room "Gold Stripe" Roller Valve SpringsStyle: Dual with Damper Outer O.D.: 1.645"Closed Pressure: 265 @ 2.120"Open Pressure: 700 @ 1.320"Coil Bind: 1.240"
Manley NexTek® Roller Valve SpringsStyle: Triple Outer O.D.: 1.677"Closed Pressure: 350 @ 2.100"Open Pressure: 1010 @ 1.200"Coil Bind: 1.142"