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COMP Cams 603-1

Steel Street Valve Locks Angle: 7°

COMP Cams 603-1

249-603-1

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Ships from Manufacturer
COMP Cams 603-1 Steel Street Valve Locks Angle: 7° $1.69
Steel Street Valve Locks
  • Angle: 7°
  • Valve Stem: 3/8"
  • Single Groove
  • 1/pkg

  • COMP Cams 603-1 Details

  • Wider Angle
  • Precision Machined
  • Super Tough
  • Inside Tang
  • 1 Year Limited Warranty

  • Specifications:

    Lock Angle
    7 Deg.
    Lock Groove Quantity
    1-groove
    Lock Material
    Hardened steel
    Lock Style
    7 degree
    Manufacturing Process
    Stamped
    Quantity
    Sold as a pair
    Recessed for Lash Cap
    No
    Valve Stem Diameter (in.)
    0.372
    Manufacturer's Part Number:
    603-1

    Most people believe that the tang inside a valve lock is what holds the valve spring retainer and spring in place while the engine is running, however tangs are not strong enough to withstand today's open spring loads of 1000+ pounds. The tang's sole purpose is to temporarily locate the lock, retainer, and spring relative to the valve until the taper of the retainer can nest around the outside surface of the lock. This creates the "collet effect" that binds the two together; the more spring force exerted on the retainer as the valve opens, the more force applied by the collet effect to keep the retainer and lock in place.

    With the emergence of valve sizes other than 5/16", 11/32", and 3/8", it is important to make sure valve locks match valve size. There should always be a small gap between the two halves of the lock when they are properly positioned on the valve stem. If the two halves are in contact without a gap, the valve locks are for a bigger stem. If the locks fit tight to the stem and leave a gap between the middle of the lock and the stem's outer diameter, the locks are too small for the valves. All locks should be checked before final installation to ensure they're the correct size.

    Comp Cams 7° Street Valve Locks are made from stamped, hardened steel. Designed for stock engine rebuilds and only recommended for street use with lighter spring loads. The 7° Race Valve Locks are available in Machined Steel or Titanium. They offer the same valve spring location accuracy as the 10° Super Locks, without the need to change to 10° retainers. Comp Cams 10° Super Locks handle higher spring pressures by distributing load over a larger area. This reduces the chance of a "pull-through" failure. Recommended for all race applications.

    Does COMP Cams 603-1 fit your vehicle?

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    1988-1995 CHEVROLET C3500 PICKUP

    • Fitment_Note: 50-State Legal~Use Appropriate Valve Locks; Retainers; Seals
    • Liter: 7.4
    • SubModel: SILVERADO
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968 FORD GALAXIE 500

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: XL
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1965 MERCURY BREEZEWAY

    • Fitment_Note: 50-State Legal
    • EngineType: ALL
    • SubModel: ALL

    1974 GMC K25/K2500 SUBURBAN

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

    1995 CHEVROLET K2500 SUBURBAN

    • Fitment_Note: 50-State Legal~Use Appropriate Valve Locks; Retainers; Seals
    • Liter: 7.4
    • SubModel: LS
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968-1970 FORD FAIRLANE

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: 500
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1966 AMERICAN MOTORS CLASSIC

    • CC: 5358
    • Fitment_Note: 50-State Legal
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.3 L / 327 )

    1990-1991 GMC R3500 PICKUP

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

    1964 FORD GALAXIE 500

    • Fitment_Note: 50-State Legal
    • Liter: 5.8
    • SubModel: XL
    • CUI: 352
    • EngineType: V8 ( 5.8 L / 352 )

    1994-1995 GMC K2500 SUBURBAN

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

    1974 GMC C25/C2500 SUBURBAN

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

    1966 FORD COUNTRY SEDAN

    • CC: 7014
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1980 AMERICAN MOTORS PACER

    • Fitment_Note: 50-State Legal
    • EngineType: ALL
    • SubModel: ALL

    1995 GMC C2500 SUBURBAN

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

    1975 CHEVROLET MALIBU

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

    1968-1969 MERCURY MARQUIS

    • Fitment_Note: 50-State Legal
    • EngineType: ALL
    • SubModel: ALL

    1995 GMC K2500 SUBURBAN

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

    1981-1984 AMERICAN MOTORS EAGLE

    • Fitment_Note: 50-State Legal
    • Liter: 4.2
    • SubModel: LIMITED
    • CUI: 258
    • EngineType: L6 ( 4.2 L / 258 )

    1980-1982 AMERICAN MOTORS SPIRIT

    • Fitment_Note: 50-State Legal
    • Liter: 4.2
    • SubModel: DL
    • CUI: 258
    • EngineType: L6 ( 4.2 L / 258 )

    1988-1993 GMC K3500 PICKUP

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

    1975-1976 FORD F-100

    • Fitment_Note: 50-State Legal
    • Liter: 5.9
    • SubModel: NORTHLAND
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1965-1970 CHEVROLET CHEVELLE

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

    1994 GMC K2500 SUBURBAN (CANADIAN)

    • EngineType: ALL
    • SubModel: ALL

    1965-1968 FORD LTD

    • CC: 7014
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1966-1967 MERCURY MONTCLAIR

    • CC: 6997
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8 ( 7.0 L / 427 )

    1974-1979 JEEP J10

    • Fitment_Note: 50-State Legal
    • EngineType: ALL
    • SubModel: ALL

    1976-1978 INTERNATIONAL SCOUT II

    • Fitment_Note: 50-State Legal
    • Liter: 5.0
    • SubModel: TRAVELER
    • CUI: 304
    • EngineType: V8 ( 5.0 L / 304 )

    1969-1970 MERCURY COUGAR

    • Fitment_Note: 50-State Legal
    • EngineType: ALL
    • SubModel: COBRA JET

    1970-1971 FORD LTD

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1987-1988 JEEP WRANGLER (YJ)

    • Fitment_Note: 50-State Legal
    • Liter: 4.2
    • SubModel: LAREDO
    • CUI: 258
    • EngineType: L6 ( 4.2 L / 258 )

    1968-1969 CHEVROLET CAMARO

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

    1980-1983 JEEP CJ5

    • Fitment_Note: 50-State Legal
    • Liter: 4.2
    • SubModel: RENEGADE
    • CUI: 258
    • EngineType: L6 ( 4.2 L / 258 )

    1967 FORD FAIRLANE

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: 500
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1966-1967 AMERICAN MOTORS AMBASSADOR

    • CC: 3261
    • Fitment_Note: 50-State Legal
    • Liter: 3.3
    • SubModel: BASE
    • CUI: 199
    • EngineType: L6 ( 3.3 L / 199 )

    1966-1967 FORD RANCH WAGON

    • CC: 7014
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1970 CHEVROLET MONTE CARLO

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

    1968 CHEVROLET C20 PICKUP

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

    1969-1974 FORD F-100

    • Fitment_Note: 50-State Legal
    • Liter: 5.9
    • SubModel: BASE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1970-1974 AMERICAN MOTORS AMBASSADOR

    • Fitment_Note: 50-State Legal
    • EngineType: ALL
    • SubModel: ALL

    1963-1966 FORD GALAXIE

    • Fitment_Note: 50-State Legal
    • Liter: 5.8
    • SubModel: BASE
    • CUI: 352
    • EngineType: V8 ( 5.8 L / 352 )

    1975-1979 JEEP CJ5

    • Fitment_Note: 50-State Legal
    • EngineType: ALL
    • SubModel: RENEGADE

    1975-1980 GMC C1500 PICKUP

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

    1969 FORD TORINO

    • CC: 7014
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • Aspiration: N
    • SubModel: GT
    • Engine Vin: Q
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1970 CHEVROLET NOVA

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

    1989-1995 GMC G35/G3500 VAN

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

    1965 FORD F-250

    • CC: 5769
    • Fitment_Note: 50-State Legal
    • Liter: 5.8
    • SubModel: BASE
    • CUI: 352
    • EngineType: V8 ( 5.8 L / 352 )

    1977 GMC C1500 PICKUP

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

    1972 CHEVROLET CHEVELLE

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

    1963-1964 MERCURY MARAUDER

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1968 AMERICAN MOTORS AMERICAN

    • CC: 3802
    • Fitment_Note: 50-State Legal
    • Liter: 3.8
    • SubModel: 440
    • CUI: 232
    • EngineType: L6 ( 3.8 L / 232 )

    1987-1988 CHEVROLET V20 SUBURBAN

    • Fitment_Note: 50-State Legal~Use Appropriate Valve Locks; Retainers; Seals
    • Liter: 7.4
    • SubModel: SCOTTSDALE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968 GMC K15/K1500 SUBURBAN

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

    1965-1966 FORD LTD

    • Fitment_Note: 50-State Legal
    • Liter: 5.8
    • SubModel: BASE
    • CUI: 352
    • EngineType: V8 ( 5.8 L / 352 )

    1975-1986 CHEVROLET C30 PICKUP

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

    1963-1966 FORD RANCH WAGON

    • Fitment_Note: 50-State Legal
    • Liter: 5.8
    • SubModel: BASE
    • CUI: 352
    • EngineType: V8 ( 5.8 L / 352 )

    1969 GMC K35/K3500 PICKUP

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

    1969 FORD TORINO

    • CC: 7014
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • Aspiration: N
    • SubModel: GT
    • Engine Vin: R
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1971-1972 CHEVROLET KINGSWOOD

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

    1989-1991 CHEVROLET R2500 SUBURBAN

    • Fitment_Note: 50-State Legal~Use Appropriate Valve Locks; Retainers; Seals
    • Liter: 7.4
    • SubModel: SCOTTSDALE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1980 AMERICAN MOTORS EAGLE

    • Fitment_Note: 50-State Legal
    • EngineType: ALL
    • SubModel: DL

    1988 CHEVROLET R20 PICKUP

    • Fitment_Note: 50-State Legal~Use Appropriate Valve Locks; Retainers; Seals
    • Liter: 7.4
    • SubModel: CHEYENNE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1968 FORD LTD

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1968 FORD CUSTOM

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1968 MERCURY COUGAR

    • CC: 6997
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8 ( 7.0 L / 427 )

    1975-1980 CHEVROLET C30 PICKUP

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

    1968-1969 CHEVROLET C10 SUBURBAN

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

    1976 CHEVROLET IMPALA

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

    1965-1966 FORD LTD

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1987-1988 CHEVROLET V20 SUBURBAN

    • Fitment_Note: 50-State Legal~Use Appropriate Valve Locks; Retainers; Seals
    • Liter: 7.4
    • SubModel: SILVERADO
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1981-1983 JEEP WAGONEER

    • Fitment_Note: 50-State Legal
    • EngineType: ALL
    • SubModel: ALL

    1966 MERCURY BREEZEWAY

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1971 GMC SPRINT

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

    1975-1978 JEEP CJ5

    • Fitment_Note: 50-State Legal
    • Liter: 4.2
    • SubModel: BASE
    • CUI: 258
    • EngineType: L6 ( 4.2 L / 258 )

    1976-1978 CHEVROLET K20 PICKUP

    • Liter: 7.4
    • SubModel: CUSTOM DELUXE
    • 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 )

    1965-1967 FORD GALAXIE 500

    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8 ( 7.0 L / 427 )

    1973-1974 CHEVROLET EL CAMINO

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

    1976 FORD F-250

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1972-1974 CHEVROLET BEL AIR

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

    1971 CHEVROLET BISCAYNE

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

    1963-1967 FORD RANCH WAGON

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1972 CHEVROLET EL CAMINO

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

    1978 INTERNATIONAL SCOUT II

    • Fitment_Note: 50-State Legal
    • Liter: 5.6
    • SubModel: SS2
    • CUI: 345
    • EngineType: V8 ( 5.6 L / 345 )

    1973 JEEP J-2600

    • Fitment_Note: 50-State Legal
    • Liter: 4.2
    • SubModel: BASE
    • CUI: 258
    • EngineType: L6 ( 4.2 L / 258 )

    1982-1983 JEEP SCRAMBLER

    • Fitment_Note: 50-State Legal
    • Liter: 4.2
    • SubModel: SL
    • CUI: 258
    • EngineType: L6 ( 4.2 L / 258 )

    1975-1976 FORD F-250

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: RANGER XLT
    • CUI: 390
    • EngineType: V8 ( 6.4 L / 390 )

    1969 FORD RANCH WAGON

    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 429
    • EngineType: V8 ( 7.0 L / 429 )

    1977-1978 CHEVROLET K5 BLAZER

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

    1970 MERCURY MONTEREY

    • CC: 7014
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 428
    • EngineType: V8 ( 7.0 L / 428 )

    1966-1967 FORD F-350

    • Fitment_Note: 50-State Legal
    • Liter: 5.8
    • SubModel: BASE
    • CUI: 352
    • EngineType: V8 ( 5.8 L / 352 )

    1979-1980 GMC C1500 SUBURBAN

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

    1976 CHEVROLET G20 VAN

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

    1968 FORD F-350

    • CC: 5900
    • Fitment_Note: 50-State Legal
    • Liter: 5.9
    • SubModel: BASE
    • CUI: 360
    • EngineType: V8 ( 5.9 L / 360 )

    1972 CHEVROLET CHEVELLE

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

    1968-1969 AMERICAN MOTORS JAVELIN

    • Fitment_Note: 50-State Legal
    • Liter: 5.6
    • SubModel: SST
    • CUI: 343
    • EngineType: V8 ( 5.6 L / 343 )

    1976 CHEVROLET K10 PICKUP

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

    1975-1986 CHEVROLET C20 PICKUP

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

    1991-1995 CHEVROLET K2500 PICKUP

    • Fitment_Note: 50-State Legal~Use Appropriate Valve Locks; Retainers; Seals
    • Liter: 7.4
    • SubModel: CHEYENNE
    • CUI: 454
    • EngineType: V8 ( 7.4 L / 454 )

    1971-1974 AMERICAN MOTORS HORNET

    • CC: 3802
    • Fitment_Note: 50-State Legal
    • Liter: 3.8
    • SubModel: SPORTABOUT
    • CUI: 232
    • EngineType: L6 ( 3.8 L / 232 )

    1969 CHEVROLET C10 PICKUP

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