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K-Motion K-950

M-400 Valve Spring Set Double Spring with Damper

K-Motion K-950

571-K-950

made in usa
jegs shipping
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K-Motion K-950 M-400 Valve Spring Set Double Spring with Damper $280.99
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

  • 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 K-Motion K-950 fit your vehicle?

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    Aspiration

    1969-1974 FORD F-350

    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1966-1967 FORD CUSTOM

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

    1964-1965 MERCURY MONTCLAIR

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

    1968 FORD MUSTANG

    • CC: 7014
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1964-1965 FORD CUSTOM

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

    1974 CHEVROLET MALIBU

    • CC: 7441
    • Liter: 7.4
    • SubModel: CLASSIC
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1966 FORD FAIRLANE

    • CC: 5769
    • Liter: 5.8
    • SubModel: BASE
    • CUI: 352
    • EngineType: V8 ( 5.8 L / 352 )

    1973 CHEVROLET K30 PICKUP

    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: L
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1964 FORD FAIRLANE

    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8 ( 7.0 L / 427 )

    1971 FORD M-400 PICKUP

    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1968-1970 FORD CUSTOM 500

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

    1966-1967 MERCURY MONTCLAIR

    • CC: 6997
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8 ( 7.0 L / 427 )

    1966-1967 FORD RANCH WAGON

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

    1970 CHEVROLET CHEVELLE

    • CC: 6588
    • Liter: 6.6
    • SubModel: NOMAD
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1964-1966 FORD CUSTOM

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 352
    • EngineType: V8 ( 5.8 L / 352 )

    1970 FORD CUSTOM 500

    • CC: 6391
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1970 GMC C1500 PICKUP

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1971 FORD COUNTRY SQUIRE

    • CC: 6391
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1971 FORD LTD

    • CC: 6391
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1989 CHEVROLET R2500 PICKUP

    • Liter: 7.4
    • SubModel: CHEYENNE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1972 CHEVROLET TOWNSMAN

    • CC: 6588
    • Liter: 6.6
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: S
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1970-1971 FORD GALAXIE 500

    • CC: 6391
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1990-1995 GMC G35/G3500 VAN

    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1970 MERCURY MARQUIS

    • CC: 6391
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BROUGHAM
    • Engine Vin: X
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1977 CHEVROLET K30 PICKUP

    • Liter: 7.4
    • SubModel: CHEYENNE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1974 CHEVROLET EL CAMINO

    • Liter: 7.4
    • SubModel: CUSTOM
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1992-1995 GMC K2500 SUBURBAN

    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1963-1966 FORD GALAXIE 500

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 352
    • EngineType: V8 ( 5.8 L / 352 )

    1974 FORD M-450 PICKUP

    • Liter: 5.9
    • SubModel: BASE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1965 FORD FAIRLANE

    • Liter: 6.4
    • SubModel: 500
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1966-1967 MERCURY VOYAGER

    • CC: 6391
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: S
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1970 GMC C15/C1500 SUBURBAN

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1969 MERCURY CYCLONE

    • CC: 7014
    • Liter: 7.0
    • Aspiration: N
    • SubModel: CJ
    • Engine Vin: R
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1973 CHEVROLET EL CAMINO

    • CC: 7441
    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1966-1967 MERCURY MARAUDER

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

    1966-1967 FORD F-250

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 352
    • EngineType: V8 ( 5.8 L / 352 )

    1968-1970 FORD CUSTOM

    • CC: 6391
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1968 FORD F-100 PICKUP

    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1966-1967 FORD F-350

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 352
    • EngineType: V8 ( 5.8 L / 352 )

    1975 GMC C25/C2500 PICKUP

    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968-1969 FORD CUSTOM 500

    • CC: 6391
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1971 FORD COUNTRY SEDAN

    • CC: 6391
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1970 GMC C35/C3500 PICKUP

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1972 CHEVROLET C10 PICKUP

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1972 CHEVROLET CHEVELLE

    • CC: 6588
    • Liter: 6.6
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1970 FORD RANCH WAGON

    • CC: 7014
    • Liter: 7.0
    • Aspiration: N
    • SubModel: POLICE CRUISER
    • Engine Vin: P
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1963-1964 FORD CLUB CARGO

    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1966-1968 FORD FAIRLANE

    • CC: 6391
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: S
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1963-1965 MERCURY MARAUDER

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

    1970 CHEVROLET CHEVELLE

    • CC: 6588
    • Liter: 6.6
    • SubModel: MALIBU
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1970 CHEVROLET TOWNSMAN

    • CC: 7441
    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968 FORD FAIRLANE

    • CC: 6391
    • Liter: 6.4
    • Aspiration: N
    • SubModel: 500
    • Engine Vin: S
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1972 CHEVROLET MONTE CARLO

    • CC: 7441
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: V
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968 FORD GALAXIE 500

    • CC: 6391
    • Liter: 6.4
    • Aspiration: N
    • SubModel: XL
    • Engine Vin: X
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1971 GMC C35/C3500 PICKUP

    • Liter: 6.6
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: K
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1968 GMC K25/K2500 PICKUP

    • CC: 6489
    • Liter: 6.5
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1966 MERCURY MONTEREY

    • CC: 6997
    • Liter: 7.0
    • SubModel: S-55
    • CUI: 427
    • EngineType: V8 ( 7.0 L / 427 )

    1966-1967 MERCURY MONTCLAIR

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

    1972 CHEVROLET CHEVELLE

    • CC: 7441
    • Liter: 7.4
    • Aspiration: N
    • SubModel: MALIBU
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1973-1974 CHEVROLET MALIBU

    • CC: 7441
    • Liter: 7.4
    • Aspiration: N
    • SubModel: ESTATE
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1966-1967 MERCURY COLONY PARK

    • CC: 6997
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8 ( 7.0 L / 427 )

    1973-1974 CHEVROLET G30 VAN

    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1971 CHEVROLET IMPALA

    • CC: 7441
    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968-1969 FORD TORINO

    • CC: 6391
    • Liter: 6.4
    • SubModel: GT
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1965 MERCURY BREEZEWAY

    • CC: 6997
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8 ( 7.0 L / 427 )

    1970 FORD GALAXIE 500

    • CC: 6391
    • Liter: 6.4
    • SubModel: XL
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1965-1967 FORD CUSTOM 500

    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8 ( 7.0 L / 427 )

    1963-1965 FORD RANCH WAGON

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

    1969-1970 FORD FAIRLANE

    • CC: 6391
    • Liter: 6.4
    • SubModel: 500
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1963-1964 FORD CLUB CARGO

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 352
    • EngineType: V8 ( 5.8 L / 352 )

    1979-1982 CHEVROLET C20 SUBURBAN

    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1973 CHEVROLET BEL AIR

    • CC: 7441
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1973-1974 CHEVROLET G10 VAN

    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1975-1980 GMC C1500 PICKUP

    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1969 MERCURY MONTEGO

    • CC: 7014
    • Liter: 7.0
    • Aspiration: N
    • SubModel: MX
    • Engine Vin: R
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1969 CHEVROLET EL CAMINO

    • CC: 6489
    • Liter: 6.5
    • SubModel: CUSTOM
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1972 CHEVROLET BEL AIR

    • CC: 6588
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1968 MERCURY MONTCLAIR

    • CC: 6391
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1967 CHEVROLET CHEVELLE

    • CC: 6489
    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1963-1965 FORD THUNDERBIRD

    • CC: 6997
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8 ( 7.0 L / 427 )

    1972 CHEVROLET CHEVELLE

    • CC: 7441
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1980 CHEVROLET K10 PICKUP

    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1986 CHEVROLET C20 SUBURBAN

    • Liter: 7.4
    • SubModel: CUSTOM
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1963-1965 FORD THUNDERBIRD

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

    1968 FORD F-250 PICKUP

    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1975-1976 CHEVROLET CAPRICE

    • Liter: 7.4
    • SubModel: ESTATE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1966-1967 FORD F-100

    • Liter: 5.8
    • SubModel: BASE
    • CUI: 352
    • EngineType: V8 ( 5.8 L / 352 )

    1969 CHEVROLET K20 PICKUP

    • CC: 6489
    • Liter: 6.5
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 396
    • EngineType: V8 ( 6.5 L / 396 )

    1976 FORD F-150

    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1968-1970 FORD CUSTOM

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

    1968 FORD F-350 PICKUP

    • Liter: 5.9
    • SubModel: BASE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1983-1984 CHEVROLET C30 PICKUP

    • Liter: 7.4
    • SubModel: CUSTOM
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1976 GMC JIMMY

    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1975 FORD F-350

    • Liter: 6.4
    • SubModel: CUSTOM
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1964-1965 FORD COUNTRY SEDAN

    • CC: 6997
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8 ( 7.0 L / 427 )

    1970 GMC K15/K1500 SUBURBAN

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1989-1995 GMC G35/G3500 VAN

    • Liter: 7.4
    • SubModel: RALLY
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1976-1978 CHEVROLET C10 SUBURBAN

    • Liter: 7.4
    • SubModel: CUSTOM DELUXE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1972 CHEVROLET CHEVELLE

    • CC: 6588
    • Liter: 6.6
    • Aspiration: N
    • SubModel: CONCOURS ESTATE
    • Engine Vin: U
    • CUI: 402
    • EngineType: V8 ( 6.6 L / 402 )

    1966-1967 FORD THUNDERBIRD

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