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 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"

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"

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"

Electro Polished Performance Valve Springs
1.539
1.125
1.000
0.760
140 @ 1.940
425 @ 1.250
413
0.730

Max Effort™ Roller Valve Springs
Style: Dual with Damper
Outer O.D.: 1.557"
Closed Pressure: 225 @ 1.950"
Open Pressure: 555 @ 1.250"
Coil Bind: 1.150"

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

Pro-Alloy Mechanical Roller Valve Springs
Style: Dual with Damper
Outer O.D.: 1.625"
Closed Pressure: 240 @ 2.000"
Open Pressure: 685 @ 1.250"
Coil Bind: 1.150"

Electro Polished Pro-Alloy Mechanical Roller Valve Springs
Style: Dual
Outer O.D.: 1.640"
Closed Pressure: 250 @ 2.000"
Open Pressure: 800 @ 1.150"
Coil Bind: 1.070"

Electro Polished Pro-Alloy Mechanical Roller Valve Springs
Style: Dual with Damper
Outer O.D.: 1.625"
Closed Pressure: 230 @ 2.100"
Open Pressure: 620 @ 1.380"
Coil Bind: 1.150"

Pacaloy Mechanical Roller Springs
1.550 Dia.
w/Special Processing
275 @ 2.000
805 @ 1.200
1.150