Howards Cams Beehive (Inverted Conical) Valve Springs
Style: Beehive
Outer O.D.: 1.450"
Closed Pressure: 118 @ 1.950"
Open Pressure: 375 @ 1.380"
Coil Bind: 1.320"

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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 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"

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

Max Effort Mech. Roller Valve Springs
Dual w/Damp
1.557
1.143
1.033
0.749
225 @ 1.950
555 @ 1.250
471
0.740

Max Effort Mech. Roller Valve Springs
Dual w/Damp
1.557
1.143
1.015
0.731
200 @ 1.950
540 @ 1.250
486
0.690

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"

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

1.260" Dia. "PAC" Valve Springs
Set of 16
410 @ 1.200
540 Rate
550 Max Lift

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"