Grand National Street Roller Springs
Style: Dual with Damper
Outer O.D.: 1.437"
Closed Pressure: 185 @ 1.750"
Open Pressure: 365 @ 1.250"
Coil Bind: 1.100"

Max Effort™ Roller Valve Springs
Style: Dual
Outer O.D.: 1.437"
Closed Pressure: 175 @ 1.750"
Open Pressure: 400 @ 1.150"
Coil Bind: 1.050"

Max Effort Roller Valve Springs
Style: Dual
Outer O.D.: 1.500"
Closed Pressure: 170 @ 1.800"
Open Pressure: 445 @ 1.250"
Coil Bind: 1.040"

PAC 1300 Series Drag Racing Valve Springs
Style: Dual
Outer O.D.: 1.500"
Closed Pressure: 250 @ 2.030"
Open Pressure: 614 @ 1.250"
Coil Bind: 1.180"

Howards Cams Pacaloy® Mechanical Roller Valve Springs w/ Special Processing
Style: Dual
Outer O.D.: 1.500"
Closed Pressure: 250 @ 2.030"
Open Pressure: 614 @ 1.250"
Coil Bind: 1.180"

Howards Cams Pacaloy® Mechanical Roller Valve Springs w/ Special Processing
Style: Dual
Outer O.D.: 1.500"
Closed Pressure: 300 @ 2.100"
Open Pressure: 1002 @ 1.200"
Coil Bind: 1.130"

PAC 1300 Series Drag Racing Valve Springs
Style: Dual
Outer O.D.: 1.500"
Closed Pressure: 375 @ 2.150"
Open Pressure: 1116 @ 1.200"
Coil Bind: 1.130"

Max Effort™ Roller Valve Springs
Style: Dual with Damper
Outer O.D.: 1.500"
Closed Pressure: 190 @ 1.920"
Open Pressure: 505 @ 1.200"
Coil Bind: 1.150"

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"

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"

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"