Jegs Free Catalog
1-800-345-4545
FREE SHIPPING!
Orders Over $95
Same Day Shipping Before 11 PM ET
0
My Cart
$0.00
Free Shipping on Orders Over $95
Shop By Vehicle
Shop By
Category
Close Menu
Top Categories
All Categories

Free Catalog
E-Mail Signup
My Account
Track Order
Gift Certificates
Rebates
Help

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
FREE Shipping
Ships
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?

    Narrow Results
    Filter By
    Year
    Filter By
    Make
    Filter By
    Model
    Filter By
    SubModel
    Filter By
    EngineType
    Filter By
    CC
    Filter By
    Liter
    Filter By
    Aspiration

    1969-1970 MERCURY MONTEREY

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

    1966 MERCURY MONTEREY

    • Liter: 6.7
    • SubModel: S-55
    • CUI: 410
    • EngineType: V8 ( 6.7 L / 410 )

    1971 GMC C1500 PICKUP

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

    1972 CHEVROLET BROOKWOOD

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

    1975-1980 GMC C1500 PICKUP

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

    1968 CHEVROLET BISCAYNE

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

    1969 GMC K25/K2500 PICKUP

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

    1969 GMC C25/C2500 SUBURBAN

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

    1968-1969 CHEVROLET C20 PICKUP

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

    1968 GMC C25/C2500 PICKUP

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

    1970 MERCURY MONTEREY

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

    1969-1974 FORD F-100

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

    1968-1969 CHEVROLET C10 SUBURBAN

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

    1992-1995 GMC K2500 SUBURBAN

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

    1990-1995 GMC G35/G3500 VAN

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

    1966-1967 FORD CUSTOM

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

    1979-1986 GMC K3500 PICKUP

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

    1965 MERCURY MONTEREY

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

    1966-1967 MERCURY COLONY PARK

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

    1988-1989 GMC G35/G3500 VAN

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

    1966-1970 MERCURY MONTEREY

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

    1970 MERCURY COUGAR

    • CC: 7014
    • Liter: 7.0
    • Aspiration: N
    • SubModel: XR-7
    • Engine Vin: Q
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1965 FORD F-250 PICKUP

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

    1986 CHEVROLET K30 PICKUP

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

    1974 FORD M-450 PICKUP

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

    1970 FORD LTD

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

    1976 FORD F-250

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

    1970 CHEVROLET C10 SUBURBAN

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

    1965 MERCURY BREEZEWAY

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

    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 )

    1979-1980 CHEVROLET C10 SUBURBAN

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

    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 MERCURY BREEZEWAY

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

    1975 CHEVROLET BEL AIR

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

    1971 CHEVROLET EL CAMINO

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

    1970 MERCURY COUGAR

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

    1968-1969 CHEVROLET CHEVELLE

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

    1970 GMC K15/K1500 SUBURBAN

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

    1965 MERCURY VILLAGER

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

    1989-1995 GMC G35/G3500 VAN

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

    1988-1993 GMC K3500 PICKUP

    • Liter: 7.4
    • SubModel: SIERRA
    • 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 )

    1967 FORD GALAXIE

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

    1965 FORD FAIRLANE

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

    1971 FORD COUNTRY SQUIRE

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

    1988-1989 CHEVROLET K3500 PICKUP

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

    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 FORD RANCHERO

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

    1975 FORD F-250

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

    1968-1969 CHEVROLET C20 SUBURBAN

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

    1988-1993 GMC C3500 PICKUP

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

    1969-1970 MERCURY COLONY PARK

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

    1991-1995 GMC K2500 PICKUP

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

    1969 CHEVROLET C30 PICKUP

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

    1965 FORD FAIRLANE

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

    1965 MERCURY CALIENTE

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

    1963-1966 FORD GALAXIE 500

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

    1973 CHEVROLET BLAZER

    • CC: 7439
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1987 CHEVROLET R20 PICKUP

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

    1971 CHEVROLET EL CAMINO

    • CC: 6588
    • Liter: 6.6
    • Aspiration: N
    • SubModel: CUSTOM
    • Engine Vin: K
    • 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 )

    1967 CHEVROLET EL CAMINO

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

    1972 CHEVROLET BEL AIR

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

    1977 GMC K25 SUBURBAN

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

    1967 CHEVROLET BISCAYNE

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

    1971 FORD LTD

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

    1970 FORD CUSTOM 500

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

    1968 GMC K25/K2500 SUBURBAN

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

    1989-1995 GMC K3500 PICKUP

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

    1976 FORD F-100

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

    1968-1969 MERCURY MONTEGO

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

    1968 MERCURY MONTCLAIR

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

    1970 FORD MUSTANG

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

    1968-1970 FORD COUNTRY SEDAN

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

    1964-1967 FORD GALAXIE 500

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

    1963-1965 FORD GALAXIE

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

    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 )

    1975-1976 CHEVROLET CAPRICE

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

    1967 CHEVROLET MALIBU

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

    1970 CHEVROLET CHEVELLE

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

    1974 GMC K25/K2500 PICKUP

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

    1966-1967 FORD RANCH WAGON

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

    1963 FORD THUNDERBIRD

    • Liter: 6.7
    • SubModel: BASE
    • CUI: 410
    • EngineType: V8 ( 6.7 L / 410 )

    1968-1969 MERCURY MONTEGO

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

    1994-1995 GMC K3500 PICKUP

    • Liter: 7.4
    • SubModel: SIERRA SL
    • 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 )

    1966-1967 MERCURY PARK LANE

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

    1971 CHEVROLET CAPRICE

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

    1969 FORD GALAXIE 500

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

    1974 CHEVROLET IMPALA

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

    1976 GMC K1500 PICKUP

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

    1967-1969 FORD MUSTANG

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

    1968 MERCURY COUGAR

    • CC: 6997
    • Liter: 7.0
    • SubModel: XR-7
    • CUI: 427
    • EngineType: V8 ( 7.0 L / 427 )

    1974 GMC SPRINT

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

    1983-1984 CHEVROLET C30 PICKUP

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

    1975 CHEVROLET MONTE CARLO

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

    1969-1970 FORD FAIRLANE

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

    1970 FORD COUNTRY SEDAN

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

    1966-1967 MERCURY COLONY PARK

    • Liter: 6.7
    • SubModel: BASE
    • CUI: 410
    • EngineType: V8 ( 6.7 L / 410 )

    1970 FORD GALAXIE 500

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