Isky Performance Valve Springs
Style: Dual with Damper
Outer O.D.: 1. 530"
Closed Pressure: 135 @ 1.875"
Open Pressure: 380 @ 1.250"
Coil Bind: 1.160"

Hi-Tech Racing Products Performance Springs
Style: Single with Damper
Outer O.D.: 1.535"
Closed Pressure: 125 @ 1.875"
Open Pressure: 350 @ 1.375"
Coil Bind: 1.200"

Howards Cams Race Saver Valve Springs
Style: Single with Damper
Outer O.D.: 1.265"
Closed Pressure: 122 @ 1.800"
Open Pressure: 375 @ 1.250"
Coil Bind: 1.100"