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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
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    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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    1970 FORD FAIRLANE

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

    1969 FORD TORINO

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

    1966 FORD FAIRLANE

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

    1969 FORD RANCHERO

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

    1979-1986 GMC C2500 SUBURBAN

    • Liter: 7.4
    • EngineType: V8
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    1970-1972 GMC C25/C2500 SUBURBAN

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

    1963 FORD FORD 300

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

    1988-1993 GMC C3500 PICKUP

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

    1968 MERCURY MONTEGO

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

    1968-1969 CHEVROLET K10 PICKUP

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

    1968 MERCURY COUGAR

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

    1968 GMC C15/C1500 SUBURBAN

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

    1969 CHEVROLET CHEVELLE

    • Liter: 6.5
    • EngineType: V8
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    1969 FORD RANCHERO

    • Liter: 7.0
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    1973 CHEVROLET K20 SUBURBAN

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    • EngineType: V8
    • SubModel: BASE

    1992-1995 GMC C2500 SUBURBAN

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

    1966-1967 MERCURY MONTEREY

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

    1968-1970 MERCURY MONTEREY

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

    1994-1995 GMC K2500 PICKUP

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

    1970-1971 CHEVROLET EL CAMINO

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

    1968-1969 CHEVROLET K10 SUBURBAN

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

    1975-1976 GMC G25/G2500 VAN

    • Liter: 7.4
    • EngineType: V8
    • SubModel: RALLY

    1971 FORD LTD

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

    1970-1972 GMC C1500 PICKUP

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

    1965 FORD LTD

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

    1968-1969 CHEVROLET BISCAYNE

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

    1989-1995 GMC C3500 PICKUP

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

    1964 FORD GALAXIE 500

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

    1976 CHEVROLET K10 PICKUP

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

    1969 MERCURY MONTEREY

    • Liter: 6.4
    • EngineType: V8
    • SubModel: CUSTOM

    1968-1969 CHEVROLET K30 PICKUP

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

    1963-1965 MERCURY MARAUDER

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

    1969 GMC C25/C2500 PICKUP

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

    1970 CHEVROLET EL CAMINO

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

    1968-1969 CHEVROLET CHEVELLE

    • Liter: 6.5
    • EngineType: V8
    • SubModel: 300 DELUXE

    1973-1974 GMC C15/C1500 SUBURBAN

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

    1974 CHEVROLET MALIBU

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

    1967 CHEVROLET CAPRICE

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

    1966-1967 MERCURY COMET

    • CC: 6391
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8

    1966-1967 MERCURY COMET

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

    1970-1971 GMC K35/K3500 PICKUP

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

    1974 GMC K25/K2500 SUBURBAN

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

    1968-1969 CHEVROLET C20 SUBURBAN

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

    1989-1995 GMC G35/G3500 VAN

    • Liter: 7.4
    • EngineType: V8
    • SubModel: VANDURA

    1966 MERCURY PARK LANE

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

    1968 MERCURY CYCLONE

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

    1966-1967 MERCURY MONTCLAIR

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

    1980-1982 CHEVROLET K30 PICKUP

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

    1964-1967 FORD GALAXIE 500

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

    1968 MERCURY PARK LANE

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

    1966-1967 MERCURY COLONY PARK

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

    1973-1974 CHEVROLET G20 VAN

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

    1991-1995 CHEVROLET K2500 PICKUP

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

    1965-1967 FORD GALAXIE 500

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

    1969 GMC K25/K2500 PICKUP

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

    1967 FORD LTD

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

    1963-1965 FORD RANCH WAGON

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

    1973-1980 GMC C1500 PICKUP

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

    1968 CHEVROLET CHEVELLE

    • Liter: 6.5
    • EngineType: V8
    • SubModel: 300

    1968 FORD MUSTANG

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

    1972 CHEVROLET BROOKWOOD

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

    1969 GMC C1500 PICKUP

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

    1964-1965 FORD FAIRLANE

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

    1989-1995 GMC K3500 PICKUP

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

    1966 FORD GALAXIE 500

    • Liter: 5.8
    • EngineType: V8
    • SubModel: XL

    1992-1995 CHEVROLET K2500 SUBURBAN

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

    1963-1966 FORD GALAXIE

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

    1966 MERCURY MONTEREY

    • Liter: 6.4
    • EngineType: V8
    • SubModel: S-55

    1967 CHEVROLET IMPALA

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

    1973 CHEVROLET LAGUNA

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

    1965-1967 FORD GALAXIE 500

    • Liter: 7.0
    • EngineType: V8
    • SubModel: XL

    1970 MERCURY COUGAR

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

    1970 MERCURY MARQUIS

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

    1970-1971 FORD GALAXIE 500

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

    1968-1969 MERCURY MARQUIS

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

    1965 MERCURY CALIENTE

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

    1973-1982 CHEVROLET C20 PICKUP

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

    1968-1969 CHEVROLET EL CAMINO

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

    1968-1969 CHEVROLET CHEVELLE

    • Liter: 6.5
    • EngineType: V8
    • SubModel: MALIBU

    1983-1984 CHEVROLET C20 PICKUP

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

    1966-1967 FORD RANCH WAGON

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

    1970-1972 GMC C25/C2500 PICKUP

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

    1987 CHEVROLET R20 PICKUP

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

    1969 FORD TORINO

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

    1973 CHEVROLET CAPRICE

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

    1988 CHEVROLET R30 PICKUP

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

    1970-1971 CHEVROLET C10 PICKUP

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

    1968 FORD CUSTOM

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

    1964-1966 FORD CUSTOM

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

    1974 GMC C25/C2500 SUBURBAN

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

    1968 MERCURY MONTEGO

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

    1968 FORD FAIRLANE

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

    1965 MERCURY COMET

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

    1967 MERCURY COUGAR

    • CC: 6391
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8

    1970 FORD MUSTANG

    • Liter: 7.0
    • Aspiration: N
    • SubModel: MACH 1
    • Engine Vin: Q
    • CUI: 428
    • EngineType: V8

    1975-1976 CHEVROLET CAPRICE

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

    1973-1980 CHEVROLET C10 PICKUP

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

    1966-1967 MERCURY COMMUTER

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

    1970-1974 CHEVROLET MONTE CARLO

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

    1969 FORD FAIRLANE

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