Howards Cams Hydraulic Roller/Mechanical Flat Tappet Valve Springs
Style: Dual
Outer O.D.: 1.437"
Closed Pressure: 145 @ 1.880"
Open Pressure: 325 @ 1.250"
Coil Bind: 1.150"

Hi-Tech Racing Products Performance Springs
Style: Dual
Outer O.D.: 1.460"
Closed Pressure: 120 @ 1.875"
Open Pressure: 425 @ 1.110"
Coil Bind: 1.080"

Howards Cams Hydraulic Roller/Mechanical Flat Tappet Valve Springs
Style: Dual
Outer O.D.: 1. 437"
Closed Pressure: 120 @ 1.875"
Open Pressure: 425 @ 1.110"
Coil Bind: 1.150"

Howards Cams Hyd./Mech. Flat Tappet & Hydraulic Roller Valve Springs
Style: Dual
Outer O.D.: 1.465"
Closed Pressure: 122 @ 1.650"
Open Pressure: 353 @ 1.100"
Coil Bind: .950"

Howards Cams Hydraulic/Mechanical Flat Tappet Valve Springs
Style: Single with Damper
Outer O.D.: 1.485"
Closed Pressure: 105 @ 1.800"
Open Pressure: 288 @ 1.300"
Coil Bind: 1.250"

Hi-Tech Racing Products, High Performance Dual Valve Springs
Style: Pacaloy Dual
Outer O.D.: 1.374"
Closed Pressure: 110 @ 1.880"
Open Pressure: 345 @ 1.330"
Coil Bind: 1.270"

Howards Cams Hydraulic Roller/Mechanical Flat Tappet Valve Springs
Style: Dual
Outer O.D.: 1.470"
Closed Pressure: 110 @ 1.880"
Open Pressure: 350 @ 1.330"
Coil Bind: 1.270"

Stock Dia. Performance Springs
Chev
Chry
Ford
351W/C/M/400

Stock Dia. Valve Springs
AMC
Chev
Chry
Ford
1.514
1.125
0.937
0.697
130 @ 1.875
330 @ 1.300
348
0.670

Electro Polished Performance Valve Springs
130 @ 1.875
330 @ 1.300
Polish
348 Rate/1.150 Coil Bind

Howards Cams Hydraulic Roller Valve Springs
Style: Dual
Outer O.D.: 1.514"
Closed Pressure: 145 @ 1.900"
Open Pressure: 360 @ 1.300"
Coil Bind: 1.270"

Electro Polished Performance Valve Springs
Dual
145 @ 1.900
335 @ 1.300
Polished
Hyd. Roller
Mech. FT