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



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

JEGS 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 07/05/16
    if Ordered Today
    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

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    1988-1989 CHEVROLET G30 VAN

    • Liter: 7.4
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    1991-1993 GMC C2500 PICKUP

    • Liter: 7.4
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    1970 MERCURY MONTEREY

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    1970 MERCURY MONTEREY

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    • CUI: 390
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    1974 GMC K25/K2500 SUBURBAN

    • Liter: 7.4
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    • CUI: 428
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    1987 CHEVROLET R30 PICKUP

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

    1965 MERCURY CYCLONE

    • CC: 6997
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8

    1968 MERCURY COUGAR

    • Liter: 7.0
    • SubModel: XR-7
    • CUI: 428
    • EngineType: V8

    1966-1967 MERCURY COMMUTER

    • CC: 6391
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: H
    • CUI: 390
    • EngineType: V8

    1973-1974 CHEVROLET LAGUNA

    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8

    1969 MERCURY CYCLONE

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

    1968 FORD RANCHERO

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

    1967 MERCURY MARQUIS

    • CC: 7014
    • Liter: 7.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: P
    • CUI: 428
    • EngineType: V8

    1987-1991 GMC V3500 PICKUP

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

    1968 MERCURY CYCLONE

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

    1992-1995 GMC K2500 SUBURBAN

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

    1970 MERCURY COUGAR

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

    1966 MERCURY BREEZEWAY

    • CC: 6997
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8

    1971-1972 CHEVROLET KINGSWOOD

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

    1968 FORD RANCHERO

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

    1965-1966 FORD GALAXIE

    • CC: 6997
    • Liter: 7.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 427
    • EngineType: V8

    1973-1982 CHEVROLET C30 PICKUP

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

    1967 CHEVROLET IMPALA

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    • EngineType: V8
    • SubModel: BASE

    1986 CHEVROLET C20 PICKUP

    • Liter: 7.4
    • EngineType: V8
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    • Liter: 6.4
    • SubModel: 500
    • CUI: 390
    • EngineType: V8

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    • EngineType: V8
    • SubModel: BASE

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    • Liter: 7.4
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    • EngineType: V8

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

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    • CUI: 390
    • EngineType: V8

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    • CC: 6997
    • Liter: 7.0
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    • CUI: 427
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    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8

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    • Liter: 7.0
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    • SubModel: BASE
    • Engine Vin: L
    • CUI: 427
    • EngineType: V8

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    • SubModel: SIERRA SL

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

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

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

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    • Liter: 6.4
    • EngineType: V8
    • SubModel: XL

    1968 FORD F-350 PICKUP

    • EngineType: V8
    • SubModel: ALL

    1988 CHEVROLET V20 SUBURBAN

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SCOTTSDALE

    1971 GMC SPRINT

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

    1963-1964 FORD CLUB CARGO

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

    1975-1976 CHEVROLET CAPRICE

    • Liter: 7.4
    • EngineType: V8
    • SubModel: ESTATE

    1970-1972 CHEVROLET MONTE CARLO

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

    1968 CHEVROLET CAMARO

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

    1964 FORD CUSTOM 500

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

    1966-1967 MERCURY MONTEREY

    • CC: 6391
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: H
    • CUI: 390
    • EngineType: V8

    1968-1969 MERCURY MARQUIS

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

    1968 MERCURY COUGAR

    • Liter: 6.4
    • SubModel: XR-7
    • CUI: 390
    • EngineType: V8

    1988 CHEVROLET R30 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: CHEYENNE

    1969 MERCURY MARAUDER

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

    1968 FORD TORINO

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

    1964-1965 FORD FAIRLANE

    • Liter: 5.8
    • EngineType: V8
    • SubModel: 500

    1966 MERCURY PARK LANE

    • CC: 6391
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: H
    • CUI: 390
    • EngineType: V8

    1987 CHEVROLET R20 SUBURBAN

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

    1967 MERCURY BROUGHAM

    • CC: 7014
    • Liter: 7.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: P
    • CUI: 428
    • EngineType: V8

    1971-1972 CHEVROLET BEL AIR

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

    1969 MERCURY CYCLONE

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

    1968 GMC K35/K3500 PICKUP

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

    1967 MERCURY MARQUIS

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

    1965 MERCURY BREEZEWAY

    • CC: 6997
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8

    1968 MERCURY MONTEGO

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

    1975 CHEVROLET MONTE CARLO

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

    1963-1965 FORD THUNDERBIRD

    • CC: 6997
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8

    1966 FORD LTD

    • CC: 7014
    • Liter: 7.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: P
    • CUI: 428
    • EngineType: V8

    1970-1972 GMC C35/C3500 PICKUP

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

    1991-1995 GMC C2500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SIERRA XC

    1973 CHEVROLET LAGUNA

    • Liter: 7.4
    • SubModel: ESTATE
    • CUI: 454
    • EngineType: V8

    1964-1965 MERCURY COMMUTER

    • CC: 6391
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: 9
    • CUI: 390
    • EngineType: V8

    1967 CHEVROLET CAPRICE

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

    1966-1967 FORD GALAXIE

    • CC: 6391
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: H
    • CUI: 390
    • EngineType: V8

    1970-1972 CHEVROLET CAMARO

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