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K-Motion K-950 - K-Motion Premium Valve Springs



K-Motion K-950 - K-Motion Premium Valve Springs

Part Number: 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
  • $278.73
    Ships 08/29/16
    if Ordered Today
    Made In USA
    FREE Shipping

    Specifications:

    Coil Bind Height (in.)
    1.15
    Coated
    No
    Damper Spring Included
    No
    Inside Diameter of Inner Spring (in.)
    0.722
    Inside Diameter of Outer Spring (in.)
    1.13
    Number of Springs Per Valve
    Dual
    Outside Diameter of Outer Spring (in.)
    1.55
    Quantity
    Sold as a set of 16
    Spring Rate
    636 lbs./in.
    Valve Spring Style
    Standard
    Manufacturer's Part Number:
    K-950

    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

    Does this fit your vehicle?

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    • CUI: 390
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    • EngineType: V8
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    • CC: 6997
    • Liter: 7.0
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    • CUI: 427
    • EngineType: V8

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    • Liter: 7.4
    • EngineType: V8
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    • Liter: 7.0
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    • CUI: 428
    • EngineType: V8

    1968-1969 FORD LTD

    • Liter: 7.0
    • SubModel: BASE
    • CUI: 428
    • EngineType: V8

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    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8

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    • Liter: 7.4
    • EngineType: V8
    • SubModel: BASE

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    • EngineType: V8
    • SubModel: BASE

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    • Liter: 5.8
    • EngineType: V8
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    • Liter: 6.4
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    • CUI: 390
    • EngineType: V8

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    • EngineType: V8

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    • EngineType: V8
    • SubModel: 500

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    • EngineType: V8
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    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8

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    • Liter: 6.6
    • EngineType: V8
    • SubModel: BASE

    1968 MERCURY COUGAR

    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8

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    • CC: 6588
    • Liter: 6.6
    • SubModel: CONCOURS ESTATE
    • EngineType: V8

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    • Liter: 6.6
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    • CUI: 402
    • EngineType: V8

    1966-1967 MERCURY COMMUTER

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    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: H
    • CUI: 390
    • EngineType: V8

    1965-1967 FORD GALAXIE 500

    • Liter: 7.0
    • EngineType: V8
    • SubModel: BASE

    1969 GMC C35/C3500 PICKUP

    • Liter: 6.5
    • EngineType: V8
    • SubModel: BASE

    1968 GMC C35/C3500 PICKUP

    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8

    1964-1966 FORD CUSTOM

    • Liter: 5.8
    • EngineType: V8
    • SubModel: BASE

    1966-1967 MERCURY COMMUTER

    • Liter: 6.7
    • EngineType: V8
    • SubModel: BASE

    1975-1978 GMC C25 SUBURBAN

    • Liter: 7.4
    • EngineType: V8
    • SubModel: BASE

    1987 CHEVROLET V20 SUBURBAN

    • Liter: 7.4
    • EngineType: V8
    • SubModel: CUSTOM DELUXE

    1971 FORD LTD

    • Liter: 6.4
    • SubModel: BROUGHAM
    • CUI: 390
    • EngineType: V8

    1968 FORD COUNTRY SEDAN

    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8

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    • Liter: 7.4
    • EngineType: V8
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    • Liter: 5.8
    • EngineType: V8
    • SubModel: BASE

    1968 GMC K25/K2500 SUBURBAN

    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8
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