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"

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"

Isky, Tool Room "Gold Stripe" Roller Valve Springs
Style: Dual with Damper
Outer O.D.: 1.645"
Closed Pressure: 265 @ 2.120"
Open Pressure: 700 @ 1.320"
Coil Bind: 1.240"

Isky, Tool Room "Gold Stripe" Roller Valve Springs
Style: Dual with Damper
Outer O.D.: 1.560"
Closed Pressure: 245 @ 1.970"
Open Pressure: 585 @ 1.290"
Coil Bind: 1.190"

Isky, Tool Room "Gold Stripe" Roller Valve Springs
Style: Dual 
Outer O.D.: 1.560"
Closed Pressure: 245 @ 1.950"
Open Pressure: 590 @ 1.250"
Coil Bind: 1.150"

Isky, Tool Room "Gold Stripe" Roller Valve Springs
Style: Dual with Damper
Outer O.D.: 1.560"
Closed Pressure: 245 @ 2.000"
Open Pressure: 600 @ 1.300"
Coil Bind: 1.200"

PAC 1300 Series Drag Racing Valve Springs
Style: Dual with Damper
Outer O.D.: 1.564"
Closed Pressure: 250 @ 2.000"
Open Pressure: 670 @ 1.200"
Coil Bind: 1.140"

Howards Cams Pacaloy® Mechanical Roller Valve Springs w/ Special Processing
Style: Dual with Damper
Outer O.D.: 1.564"
Closed Pressure: 250 @ 2.000"
Open Pressure: 670 @ 1.200"
Coil Bind: 1.140"

Howards Cams Pacaloy® Roller Valve Springs
Style: Dual
Outer O.D.: 1.570"
Closed Pressure: 190 @ 1.950"
Open Pressure: 710 @ 1.250"
Coil Bind: 1.035"

Isky, Tool Room "Gold Stripe" Roller Valve Springs
Style: Dual with Damper
Outer O.D.: 1.570"
Closed Pressure: 250 @ 2.030"
Open Pressure: 625 @ 1.300"
Coil Bind: 1.200"

Howards Cams Pacaloy® Roller Valve Springs
Style: Dual with Damper
Outer O.D.: 1.570"
Closed Pressure: 275 @ 2.000"
Open Pressure: 805 @ 1.200"
Coil Bind: 1.150"

PAC 1300 Series Drag Racing Valve Springs
Style: Dual with Damper
Outer O.D.: 1.574"
Closed Pressure: 265 @ 2.000"
Open Pressure: 705 @ 1.200"
Coil Bind: 1.150"