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PSI uses state-of-the-art CNC equipment throughout the manufacturing process to ensure batch-to-batch consistency and valve springs that are held to the tightest tolerances in the industry. At PSI, all production processes are done in-house according to strict Quality Control procedures with each spring proudly made in the USA. All PSI springs are 100% load tested and set matched for the ultimate in customer convenience and satisfaction.
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PSI DR1247, Triple Valve Spring, OD 1.660, 750lb PSI PSI DR1247, Triple Valve Spring, OD 1.660, 750lb PSI, Set of 16

Triple Drag Spring 1.660" OD, 1.195" ID Outer, 0.630" ID Inner, 340lbs@2.070" seat pressure, 940lbs@1.270" Open Pressure

Regular Price: $415.00
PSI CT1225ML, Dual Valve Spring, OD 1.445in, 939lb PSI PSI CT1225ML, Dual Valve Spring, OD 1.445in, 939lb PSI, Set of 16

Dual Endurance Spring 1.445" OD, 1.060" ID Outer, 0.775" ID Inner, 140lbs@1.950" seat pressure, 435lbs@1.200" Open Pressure

Regular Price: $400.00
PSI CT1541ML, Dual Valve Spring, OD 1.510, 494lb PSI PSI CT1541ML, Dual Valve Spring, OD 1.510, 494lb PSI, Set of 16

Dual Circle Track 1.510" OD, 1.085" ID Outer, 0.790" ID Inner, 240lbs@2.030" seat pressure, 625lbs@1.250" Open Pressure

Regular Price: $590.00
PSI CT1573ML, Dual Valve Spring, OD 4.550, 671lb PSI PSI CT1573ML, Dual Valve Spring, OD 4.550, 671lb PSI. Set of 16

Dual Circle Track 1.550" OD, 1.100" ID Outer, 0.775" ID Inner, 220lbs@2.030" seat pressure, 743lbs@1.250" Open Pressure

Regular Price: $590.00
PSI CT1574ML, Dual Valve Spring, OD 1.510, 625lb PSI PSI CT1574ML, Dual Valve Spring, OD 1.510, 625lb PSI, Set of 16

Dual Circle Track 1.510" OD, 1.085" ID Outer, 0.760" ID Inner, 180lbs@1.980" seat pressure, 680lbs@1.180" Open Pressure

Regular Price: $580.00
PSI CT1575ML-TCRE, Dual Valve Spring, OD 1.400, 559lb PSI PSI CT1575ML-TCRE, Dual Valve Spring, OD 1.400, 559lb PSI., Set of 16

Dual Circle Track 1.400" OD, 0.995" ID Outer, 0.700" ID Inner, 150lbs@2.00" seat pressure, 625lbs@1.150" Open Pressure

Regular Price: $650.00
PSI DR1248, Triple Valve Spring, OD 1.660, 744lb PSI PSI DR1248, Triple Valve Spring, OD 1.660, 744lb PSI, Set of 16

Triple Drag Spring 1.660" OD, 1.195" ID Outer, 0.870" ID Inner, 375lbs@2.100" seat pressure, 1045lbs@1.200" Open Pressure

Regular Price: $400.00
PSI DR1249ML, Triple Valve Spring, OD 1.660, 725lb PSI PSI DR1249ML, Triple Valve Spring, OD 1.660, 725lb PSI, Set of 16

Triple Drag Spring 1.660" OD, 1.195" ID Outer, 0.630" ID Inner, 385lbs@2.200" seat pressure, 1100lbs@1.200" Open Pressure

Regular Price: $540.00
PSI DR1253RML, Triple Valve Spring, OD 1.630, 724lb PSI PSI DR1253RML, Triple Valve Spring, OD 1.630, 724lb PSI, Set of 16

Triple Drag Spring 1.630" OD, 1.180" ID Outer, 0.870" ID Inner, 440lbs@2.200" seat pressure, 1200lbs@1.150" Open Pressure

Regular Price: $575.00
PSI DR1254RML, Dual Valve Spring, OD 1.520, 767lb PSI PSI DR1254RML, Dual Valve Spring, OD 1.520, 767lb PSI, Set of 16

Dual Drag Spring 1.520" OD, 1.070" ID Outer, 0.745" ID Inner, 350lbs@2.100" seat pressure, 1040lbs@1.200" Open Pressure

Regular Price: $490.00
PSI DR1257RML, Dual Valve Spring, OD 1.070, 1000lb PSI PSI DR1257RML, Dual Valve Spring, OD 1.070, 1000lb PSI

Dual Drag Spring 1.570" OD, 1.070" ID Outer, 0.750" ID Inner, 410lbs@2.150" seat pressure, 1260lbs@1.300" Open Pressure

Regular Price: $31.26
PSI DR1261RML, Triple Valve Spring, OD 1.675, 767lb PSI PSI DR1261RML, Triple Valve Spring, OD 1.675, 767lb PSI, Set of 16

Triple Drag Spring 1.675" OD, 1.195" ID Outer, 0.630" ID Inner, 525lbs@2.300" seat pressure, 1330lbs@1.250" Open Pressure

Regular Price: $590.00
PSI DR1262RML, Triple Valve Spring, OD 1.710, 900lb PSI PSI DR1262RML, Triple Valve Spring, OD 1.710, 900lb PSI, Set of 16

Triple Drag Spring 1.710" OD, 1.210" ID Outer, 0.630" ID Inner, 515lbs@2.300" seat pressure, 1460lbs@1.250" Open Pressure

Regular Price: $540.00
PSI DR1263RML, Triple Valve Spring, OD 1.675, 809lb PSI PSI DR1263RML, Triple Valve Spring, OD 1.675, 809lb PSI, Set of 16

Triple Drag Spring 1.675" OD, 1.195" ID Outer, 0.630" ID Inner, 425lbs@2.400" seat pressure, 1355lbs@1.250" Open Pressure

Regular Price: $540.00
PSI LS1512ML, Dual Valve Spring, OD 1.275, 408lb PSI PSI LS1512ML, Dual Valve Spring, OD 1.275, 408lb PSI, Set of 16

Dual LS1/LS6 Spring 1.275" OD, 0.935" ID Outer, 0.665" ID Inner, 130lbs@1.800" seat pressure, 395lbs@1.150" Open Pressure

Regular Price: $365.00
PSI CT1242, Dual Valve Spring, OD 1.580in, 513lb PSI PSI CT1242, Dual Valve Spring, OD 1.580in, 513lb PSI, Set of 16

Dual Circle Track 1.580" OD, 1.060" ID Outer, 0.835" ID Inner, 248lbs@2.050" seat pressure, 640lbs@1.270" Open Pressure

Regular Price: $400.00
PSI CT1242D, Damper Valve Spring, OD 1.580in, 513lb PSI PSI CT1242D, Damper Valve Spring, OD 1.580in, 513lb PSI, Set of 16

Dual Circle Track 1.580" OD, 1.155" ID Outer, 0.755" ID Inner, 250lbs@2.050" seat pressure, 650lbs@1.270" Open Pressure

Regular Price: $400.00
PSI CT1542ML, Dual Valve Spring, OD 1.580, 513lb PSI PSI CT1542ML, Dual Valve Spring, OD 1.580, 513lb PSI, Set of 16

Dual Circle Track 1.580" OD, 1.160" ID Outer, 0.835" ID Inner, 248lbs@2.050" seat pressure, 640lbs@1.270" Open Pressure

Regular Price: $590.00
PSI LS1511ML, Beehive Valve Spring, OD 1.290, 380lb PSI PSI LS1511ML, Beehive Valve Spring, OD 1.290, 380lb PSI, Set of 16

Single Beehive LS1/LS6 Spring 1.290" OD, 0.630" ID Outer, 130lbs@1.800" seat pressure, 370lbs@1.175" Open Pressure

Regular Price: $205.00
PSI CT1540ML, Dual Valve Spring, OD 1.500 Inch, 610 Lbs. PSI CT1540ML, Dual Valve Spring, OD 1.500 Inch, 610 Lbs. Set of 16

PSI CT1540ML, Dual Valve Spring, OD 1.500 Inch, 610 Lbs.

Regular Price: $590.00
PSI CT1574ML-TC, Dual Valve Spring, OD 1.510 Inch, 680 Lbs. PSI CT1574ML-TC, Dual Valve Spring, OD 1.510 Inch, 680 Lbs. Set of 16

PSI CT1574ML-TC, Dual Valve Spring, OD 1.510 Inch, 680 Lbs.

Regular Price: $675.00
PSI CT1575ML Dual Valve Spring, OD 1.400 Inch, 625 Lbs PSI CT1575ML Dual Valve Spring, OD 1.400 Inch, 625 Lbs., Set of 16

This series has all the benefits of the 1200's plus an additional nitriding operation. PSI CT1575ML Dual Valve Spring, OD 1.400 Inch, 625 Lbs

Regular Price: $590.00
PSI dual valve spring CT1539ML PSI CT1539ML, Dual Valve Spring, OD 1.500 Inch, 575 lbs. Set of 16

PSI CT1539ML, Dual Valve Spring, OD 1.500 Inch, 575 lbs.

Regular Price: $590.00
PSI dual valve spring CT1572ML PSI CT1572ML, Dual Valve Spring, 1.510 Inch, 650 Lbs. Set of 16

PSI CT1572ML, Dual Valve Spring, 1.510 Inch, 650 Lbs.

Regular Price: $590.00
   
 
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