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K-Motion Premium Valve Springs


K-Motion
K-Motion Premium Valve Springs

Product images may differ from actual product appearance.

The Overwhelming Choice of Racers!

K-Motion Valve Springs deliver the high quality and superior dependability required to meet their performance requirements. K-Motion starts with the highest quality wire available. All alloys used are manufactured and inspected to the highest industry standards. Quality wire is the first essential step in manufacturing springs designed for extreme, high, aggressive cam lifts and ramp speeds.

Metallurgists measure a material's resistance to failure with fracture toughness. This, combined with the material's strength, determines whether or not a material is a suitable choice for a specific application. This is why K-Motion Valve Springs utilize four different alloys. For each application, only the proper material is selected. After coiling, springs receive a variety of carefully controlled heat treatment and surface finishing processes. The intent is to reduce load loss and increase spring life. Each spring is visually inspected for surface imperfections, which could lead to early breakage, and dampers are radius ground and depointed for longer spring life.

Each valve spring assembly is cold pressed with as much as 2500 pounds of pressure, based on application. A pink stripe is added for identification, and then each spring is individually pressure checked & boxed with no more than 5 pounds variation per box. From design to manufacturing to load matching spring sets, every effort is made to provide the very best valve springs.

Click Here for Spring Pressure Data Chart or Spring Dimensional Data Chart


29 Products
M-200 Valve Springs

571-K-700
M-200 Valve Spring Set
  • Single Spring
  • 1.265'' OD
  • 0.880'' ID
  • 120 @ 1.700'' Seat Pressure
  • 375 @ 1.150'' Open Pressure
  • 464 lbs/in Spring Rate
  • .500'' Max Valve Lift
  • 1.050'' Coil Bind
  • 16/pkg
  • $54.99
    Ships
    M-300 Valve Springs

    571-K-750
    M-300 Valve Spring Set
  • Single Spring
  • 1.265'' OD
  • 0.880'' ID
  • 130 @ 1.700'' Seat Pressure
  • 395 @ 1.150'' Open Pressure
  • 482 lbs/in Spring Rate
  • .610'' Max Valve Lift
  • 1.050'' Coil Bind
  • 16/pkg
  • $138.99
    Ships

    571-K-750-1
    M-300 Valve Spring
  • Single Spring
  • 1.265'' OD
  • 0.880'' ID
  • 130 @ 1.700'' Seat Pressure
  • 395 @ 1.150'' Open Pressure
  • 482 lbs/in Spring Rate
  • .610'' Max Valve Lift
  • 1.050'' Coil Bind
  • 1/pkg
  • $19.99
    Order Today Ships 09/04/15
      571-K-775
    M-300 Valve Spring Set
  • Double Spring (LS Engine)
  • 1.300'' OD (.955'' ID)
  • 0.685'' ID
  • 155 @ 1.780'' Seat Pressure
  • 380/400 @ 1.180/1.130'' Open Pressure
  • 375 lbs/in Spring Rate
  • .660'' Max Valve Lift
  • 1.070'' Coil Bind
  • 16/pkg
  • $162.99
    Ships
      571-K-775S
    K-775 Valve Spring Drop-In Kit
    Includes:
  • M-300 Valve Springs
  • Steel Retainers (Standard Height)
  • 7° Valve Locks
  • Valve Seals
  • Spring Locators
  • $279.99
    Ships
      571-K-775T
    K-775 Valve Spring Drop-In Kit
    Includes:
  • M-300 Valve Springs
  • Titanium Retainers (Standard Height)
  • 7° Valve Locks
  • Valve Seals
  • Spring Locators
  • $414.99
    Ships

    571-K-800
    M-300 Valve Spring Set
  • Double Spring
  • 1.460'' OD (1.075'' Outer ID)
  • 0.782'' ID
  • 165 @ 1.850'' Seat Pressure
  • 471 @ 1.200'' Open Pressure
  • 471 lbs/in Spring Rate
  • .700'' Max Valve Lift
  • 1.085'' Coil Bind
  • 16/pkg
  • $104.99
    Ships

    571-K-800-1
    M-300 Valve Spring
  • Double Spring
  • 1.460'' OD (1.075'' Outer ID)
  • 0.782'' ID
  • 165 @ 1.850'' Seat Pressure
  • 471 @ 1.200'' Open Pressure
  • 471 lbs/in Spring Rate
  • .700'' Max Valve Lift
  • 1.085'' Coil Bind
  • 1/pkg
  • $16.99
    Order Today Ships 09/04/15

    571-K-850
    M-300 Valve Spring Set
  • Double Spring with Damper
  • 1.550'' OD (1.120'' Outer ID)
  • 0.770'' ID
  • 135 @ 1.900'' Seat Pressure
  • 419 @ 1.250'' Open Pressure
  • 437 lbs/in Spring Rate
  • .630'' Max Valve Lift
  • 1.160'' Coil Bind
  • 16/pkg
  • $183.99
    Order Today Ships 09/04/15

    571-K-1100
    M-300 Valve Spring Set
  • Double Spring with Damper
  • 1.550'' OD (1.136'' Outer ID)
  • 0.721'' ID
  • 230 @ 1.900'' Seat Pressure
  • 555 @ 1.250'' Open Pressure
  • 500 lbs/in Spring Rate
  • .640'' Max Valve Lift
  • 1.125'' Coil Bind
  • 16/pkg
  • $138.99
    Order Today Ships 09/09/15

    571-K-1150
    M-300 Valve Spring Set
  • Double Spring with Damper
  • 1.550'' OD (1.136'' Outer ID)
  • 0.725'' ID
  • 230 @ 2.000'' Seat Pressure
  • 628 @ 1.250'' Open Pressure
  • 531 lbs/in Spring Rate
  • .700'' Max Valve Lift
  • 1.150'' Coil Bind
  • 16/pkg
  • $203.99
    Order Today Ships 09/04/15

    571-K-1600
    M-300 Valve Spring Set
  • Double Spring with Damper
  • 1.550'' OD (1.136'' Outer ID)
  • 0.721'' ID
  • 205 @ 1.950'' Seat Pressure
  • 555 @ 1.250'' Open Pressure
  • 500 lbs/in Spring Rate
  • .640'' Max Valve Lift
  • 1.125'' Coil Bind
  • 16/pkg
  • $138.99
    Order Today Ships 09/04/15

    571-K-1650
    M-300 Valve Spring Set
  • Double Spring with Damper
  • 1.550'' OD (1.136'' Outer ID)
  • 0.700'' ID
  • 200 @ 2.000'' Seat Pressure
  • 702 @ 1.250'' Open Pressure
  • 669 lbs/in Spring Rate
  • .725'' Max Valve Lift
  • 1.150'' Coil Bind
  • 16/pkg
  • $262.99
    Order Today Ships 09/04/15
    M-400 Valve Springs

    571-K-900
    M-400 Valve Spring Set
  • Double Spring with Damper
  • 1.550'' OD (1.100'' Outer ID)
  • 0.717'' ID
  • 312 @ 1.850'' Seat Pressure
  • 727 @ 1.200'' Open Pressure
  • 621 lbs/in Spring Rate
  • .700'' Max Valve Lift
  • 1.090'' Coil Bind
  • 16/pkg
  • $291.99
    Ships

    571-K-950
    M-400 Valve Spring Set
  • Double Spring with Damper
  • 1.550'' OD (1.130'' Outer ID)
  • 0.722'' ID
  • 245 @ 2.000'' Seat Pressure
  • 690 @ 1.300'' Open Pressure
  • 636 lbs/in Spring Rate
  • .750'' Max Valve Lift
  • 1.150'' Coil Bind
  • 16/pkg
  • $278.99
    Ships

    571-K-950-1
    M-400 Valve Spring
  • Double Spring with Damper
  • 1.550'' OD (1.130'' Outer ID)
  • 0.722'' ID
  • 245 @ 2.000'' Seat Pressure
  • 690 @ 1.300'' Open Pressure
  • 636 lbs/in Spring Rate
  • .750'' Max Valve Lift
  • 1.150'' Coil Bind
  • 1/pkg
  • $35.99
    Order Today Ships 09/04/15

    571-K-1000
    M-400 Valve Spring Set
  • Double Spring with Damper
  • 1.625'' OD (1.170'' Outer ID)
  • 0.756'' ID
  • 240 @ 1.900'' Seat Pressure
  • 739 @ 1.200'' Open Pressure
  • 713 lbs/in Spring Rate
  • .750'' Max Valve Lift
  • 1.090'' Coil Bind
  • 16/pkg
  • $278.99
    Ships

    571-K-1000-1
    M-400 Valve Spring
  • Double Spring with Damper
  • 1.625'' OD (1.170'' Outer ID)
  • 0.756'' ID
  • 240 @ 1.900'' Seat Pressure
  • 739 @ 1.200'' Open Pressure
  • 713 lbs/in Spring Rate
  • .750'' Max Valve Lift
  • 1.090'' Coil Bind
  • 1/pkg
  • $33.99
    Order Today Ships 09/04/15

    571-K-1000H
    M-400 Valve Spring Set
  • Double Spring with Damper
  • 1.625'' OD (1.170'' Outer ID)
  • 0.756'' ID
  • 265 @ 2.000'' Seat Pressure
  • 825 @ 1.200'' Open Pressure
  • 700 lbs/in Spring Rate
  • .850'' Max Valve Lift
  • 1.090'' Coil Bind
  • 16/pkg
  • $275.99
    Ships

    571-K-1000H-1
    M-400 Valve Spring
  • Double Spring with Damper
  • 1.625'' OD (1.170'' Outer ID)
  • 0.756'' ID
  • 265 @ 2.000'' Seat Pressure
  • 825 @ 1.200'' Open Pressure
  • 700 lbs/in Spring Rate
  • .850'' Max Valve Lift
  • 1.090'' Coil Bind
  • 1/pkg
  • $31.99
    Ships
    M-500 Valve Springs

    571-K-975
    M-500 Valve Spring Set
  • Double Spring
  • 1.500'' OD (1.050'' Outer ID)
  • 0.725'' ID
  • 285 @ 2.050'' Seat Pressure
  • 948 @ 1.200'' Open Pressure
  • 780 lbs/in Spring Rate
  • .850'' Max Valve Lift
  • 1.130'' Coil Bind
  • 16/pkg
  • $438.99
    Manufacturer's
    Availability
    Date Unknown

    571-K-975H
    M-500 Valve Spring Set
  • Double Spring
  • 1.500'' OD (1.050'' Outer ID)
  • 0.725'' ID
  • 310 @ 2.100'' Seat Pressure
  • 1012 @ 1.200'' Open Pressure
  • 780 lbs/in Spring Rate
  • .900'' Max Valve Lift
  • 1.130'' Coil Bind
  • 16/pkg
  • $438.99
    Manufacturer's
    Availability
    Date Unknown

    571-K-1900
    M-500 Valve Spring Set
  • Double Spring
  • 1.500'' OD (1.050'' Outer ID)
  • 0.725'' ID
  • 442 @ 2.200'' Seat Pressure
  • 1183 @ 1.250'' Open Pressure
  • 780 lbs/in Spring Rate
  • 1.000'' Max Valve Lift
  • 1.130'' Coil Bind
  • 16/pkg
  • $378.99
    Manufacturer's
    Availability
    Date Unknown
      571-K-2000
    M-500 Valve Spring Set
  • Triple Spring
  • 1.725'' OD (1.225'' Outer ID)
  • 0.870'' ID/0.635'' ID
  • 520 @ 2.350'' Seat Pressure
  • 1154 @ 1.250'' Open Pressure
  • 945 lbs/in Spring Rate
  • 1.100'' Max Valve Lift
  • 1.135'' Coil Bind
  • 16/pkg
  • $544.99
    Order Today Ships 09/04/15
    H-11 Valve Springs

    571-K-1200
    H-11 Valve Spring Set
  • Double Spring
  • 1.625'' OD (1.175'' Outer ID)
  • 0.816'' ID
  • 260 @ 2.000'' Seat Pressure
  • 883 @ 1.250'' Open Pressure
  • 831 lbs/in Spring Rate
  • .790'' Max Valve Lift
  • 1.150'' Coil Bind
  • 16/pkg
  • $313.99
    Order Today Ships 09/04/15
      571-K-1400-1
    H-11 Valve Spring
  • Triple Spring
  • 1.625'' OD (1.205'' Outer ID)
  • 0.895'' ID/0.640'' ID
  • 250 @ 2.200'' Seat Pressure
  • 820 @ 1.250'' Open Pressure
  • 600 lbs/in Spring Rate
  • .990'' Max Valve Lift
  • 1.150'' Coil Bind
  • 1/pkg
  • $40.99
    Order Today Ships 09/04/15
      571-K-1500
    H-11 Valve Spring Set
  • Triple Spring
  • 1.650'' OD (1.200'' Outer ID)
  • 0.842'' ID/0.635'' ID
  • 265 @ 2.000'' Seat Pressure
  • 950 @ 1.200'' Open Pressure
  • 856 lbs/in Spring Rate
  • .850'' Max Valve Lift
  • 1.090'' Coil Bind
  • 16/pkg
  • $339.99
    Order Today Ships 09/04/15
      571-K-1500-1
    H-11 Valve Spring
  • Triple Spring
  • 1.650'' OD (1.200'' Outer ID)
  • 0.842'' ID/0.635'' ID
  • 265 @ 2.000'' Seat Pressure
  • 950 @ 1.200'' Open Pressure
  • 856 lbs/in Spring Rate
  • .850'' Max Valve Lift
  • 1.090'' Coil Bind
  • 1/pkg
  • $28.99
    Order Today Ships 09/04/15
      571-K-1700
    H-11 Valve Spring Set
  • Triple Spring
  • 1.650'' OD (1.207'' Outer ID)
  • 0.895'' ID/0.635'' ID
  • 360 @ 2.000'' Seat Pressure
  • 880 @ 1.250'' Open Pressure
  • 694 lbs/in Spring Rate
  • .840'' Max Valve Lift
  • 1.150'' Coil Bind
  • 16/pkg
  • $333.99
    Order Today Ships 09/04/15

    29 Products