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"

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

Max Effort Mechanical Roller Valve Springs
Dual
1.437
1.080
1.080
0.796
175 @ 1.750
400 @ 1.150
375 0.625

Electro Polished Performance Valve Springs
1.539
1.125
145 @ 1.880
350 @ 1.250
335
0.670
1.200

Electro Polished Performance Valve Springs
145 @ 1.750
315 @ 1.150
Polished
Hyd. Roller
Mech. FT

Max Effort Mech. Roller Valve Springs
Dual w/Damp
1.539
1.125
1.015
0.731
194 @ 1.920
505 @ 1.200
510
0.720

Race Saver Yellow Stripe Valve Springs
Set 16
1.265
0.875
122 @ 1.800
375 @ 1.250
460
0.640
1.100

Electro Polished Performance Valve Springs
16 Pc.
1.265
0.875
115 @ 1.800
380 @ 1.200
430
0.640
1.100

Electro Polished Inverted Conical Valve Springs
1.280/1.035
0.900
0.650
108@1.800
329@1.625/345@1.225

Inverted Conical Valve Springs
GM Gen III LS1/2/6
1.055/1.289
0.660/0.880
102@1.800
260@1.200
265
0.600

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"