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"

Pacaloy Mechanical Roller Springs
1.62 Dia.
275 @ 2.000 Seat
810 @ 1.150 Open
1.100 Coil Bind

1200 Series Drag Springs
1.645 Triple
332 @ 2.100
950 @ 1.200
687 Rate
1.130 Coil Bind
0.900 Max Lift

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"

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

1300 Series Drag Racing Springs
1.645 Triple
1.0 Lift
Set of 16

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"

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

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"

PAC 1300 Series Drag Racing Valve Springs
Style: Dual
Outer O.D.: 1.550"
Closed Pressure: 275 @ 2.000"
Open Pressure: 805 @ 1.200"
Coil Bind: 1.150"

Howards
Grand National Street Roller Springs
1.437 Dia