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 Hydraulic Roller/Mechanical Flat Tappet Valve Springs
Style: Dual
Outer O.D.: 1.500"
Closed Pressure: 145 @ 1.940"
Open Pressure: 425 @ 1.250"
Coil Bind: 1.100"

Howards Cams Electro Polished Performance Valve Springs
Style: Dual with Damper
Outer O.D.: 1.539"
Closed Pressure: 140 @ 1.940"
Open Pressure: 425 @ 1.250"
Coil Bind: 1.150"

Max Effort™ Roller Valve Springs
Style: Dual with Damper
Outer O.D.: 1.500"
Closed Pressure: 190 @ 1.920"
Open Pressure: 505 @ 1.200"
Coil Bind: 1.150"

Max Effort™ Roller Valve Springs
Style: Dual with Damper
Outer O.D.: 1.539"
Closed Pressure: 194 @ 1.920"
Open Pressure: 505 @ 1.200"
Coil Bind: 1.150"

Howards Cams Hydraulic Flat Tappet Valve Springs
Style: Single with Damper
Outer O.D.: 1.550"
Closed Pressure: 145 @ 1.880"
Open Pressure: 350 @ 1.250"
Coil Bind: 1.200"

Howards Cams Electro Polished Performance Valve Springs
Style: Hydraulic/Mechanical Flat Tappet & Hydraulic Roller Single with Damper
Outer O.D.: 1.550"
Closed Pressure: 145 @ 1.880"
Open Pressure: 350 @ 1.250"
Coil Bind: 1.200"

Hi-Tech Racing Products Performance Springs
Style: Single with Damper
Outer O.D.: 1.540"
Closed Pressure: 145 @ 1.880"
Open Pressure: 355 @ 1.250"
Coil Bind: 1.050"

Pro-Alloy Mechanical Roller Valve Springs
Style: Dual
Outer O.D.: 1.550"
Closed Pressure: 209 @ 1.900"
Open Pressure: 525 @ 1.300"
Coil Bind: 1.080"

Electro Polished Pro-Alloy Mechanical Roller Valve Springs
Style: Dual
Outer O.D.: 1.550"
Closed Pressure: 209 @ 1.900"
Open Pressure: 525 @ 1.300"
Coil Bind: 1.080"

Electro Polished Pro-Alloy Mechanical Roller Valve Springs
Style: Dual with Damper
Outer O.D.: 1.540"
Closed Pressure: 215 @ 1.950"
Open Pressure: 575 @ 1.230"
Coil Bind: 1.190"