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COMP Cams 603-16

Steel Street Valve Locks Angle: 7°



COMP Cams 603-16
Representative Image
Product images may differ from actual product appearance.

Part Number: 249-603-16

Steel Street Valve Locks
  • Angle: 7°
  • Valve Stem: 3/8"
  • Single Groove
  • 16/pkg
  • $15.37
    Ships
    COMP Cams 603-16 Steel Street Valve Locks Angle: 7° $15.37

    COMP Cams 603-16 Details

    Street Valve Locks

  • 7° lock angle

  • 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 set of 32
    Recessed for Lash Cap
    No
    Valve Stem Diameter (in.)
    0.372
    Manufacturer's Part Number:
    603-16

    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 603-16 fit your vehicle?

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    1974 AMERICAN MOTORS MATADOR

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

    1968-1970 FORD COUNTRY SQUIRE

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8

    1968 FORD RANCH WAGON

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

    1968 MERCURY COUGAR

    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: XR-7
    • CUI: 428
    • EngineType: V8

    1968-1969 AMERICAN MOTORS AMBASSADOR

    • Fitment_Note: 50-State Legal
    • Liter: 5.6
    • SubModel: SST
    • EngineType: V8

    1974-1983 JEEP CHEROKEE (SJ)

    • Fitment_Note: 50-State Legal
    • EngineType: V8
    • SubModel: BASE

    1963-1967 FORD GALAXIE

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • EngineType: V8

    1972-1973 INTERNATIONAL PICKUP 1210

    • Fitment_Note: 50-State Legal
    • Liter: 5.0
    • SubModel: BASE
    • EngineType: V8

    1988-1993 GMC C3500 PICKUP

    • Fitment_Note: 50-State Legal~Truck Motors Have .400 in. Taller Block
    • Liter: 7.4
    • SubModel: SIERRA
    • EngineType: V8

    1973-1974 AMERICAN MOTORS HORNET

    • CC: 5899
    • Fitment_Note: 50-State Legal
    • Liter: 5.9
    • SubModel: BASE
    • CUI: 360
    • EngineType: V8

    1970 FORD COUNTRY SQUIRE

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 390
    • EngineType: V8

    1969 MERCURY CYCLONE

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

    1968 MERCURY COUGAR

    • CC: 7014
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • Aspiration: N
    • SubModel: XR-7
    • Engine Vin: R
    • CUI: 428
    • EngineType: V8

    1974 AMERICAN MOTORS MATADOR

    • Fitment_Note: 50-State Legal
    • EngineType: V8
    • SubModel: BROUGHAM

    1970 MERCURY COUGAR

    • CC: 7014
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • Aspiration: N
    • SubModel: COBRA JET
    • Engine Vin: R
    • CUI: 428
    • EngineType: V8

    1969 AMERICAN MOTORS AMBASSADOR

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: DPL
    • EngineType: V8

    1970-1971 CHEVROLET K30 PICKUP

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

    1972 AMERICAN MOTORS HORNET

    • Fitment_Note: 50-State Legal
    • Liter: 5.9
    • SubModel: SST
    • CUI: 360
    • EngineType: V8

    1968 MERCURY COUGAR

    • CC: 6997
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • EngineType: V8

    1991-1993 GMC C2500 PICKUP

    • Fitment_Note: 50-State Legal~Truck Motors Have .400 in. Taller Block
    • Liter: 7.4
    • SubModel: SIERRA SLX
    • EngineType: V8

    1994 GMC K2500 SUBURBAN (CANADIAN)

    • Fitment_Note: 50-State Legal~Truck Motors Have .400 in. Taller Block~Use Appropriate Valve Locks; Retainers; Seals
    • EngineType: ALL
    • SubModel: ALL

    1989 CHEVROLET R2500 PICKUP

    • Fitment_Note: 50-State Legal~Use Appropriate Valve Locks; Retainers; Seals
    • Liter: 7.4
    • SubModel: SILVERADO
    • EngineType: V8

    1970 CHEVROLET CHEVELLE

    • CC: 6588
    • Liter: 6.6
    • SubModel: MALIBU
    • EngineType: V8

    1965 MERCURY CALIENTE

    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • EngineType: V8

    1964-1967 FORD CUSTOM

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • EngineType: V8

    1967 FORD GALAXIE

    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: R
    • CUI: 427
    • EngineType: V8

    1979-1980 GMC C1500 SUBURBAN

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

    1971 FORD COUNTRY SEDAN

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • EngineType: V8

    1972 CHEVROLET CHEVELLE

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

    1968-1970 FORD COUNTRY SEDAN

    • CC: 7014
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: P
    • CUI: 428
    • EngineType: V8

    1970 AMERICAN MOTORS AMBASSADOR

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

    1968 AMERICAN MOTORS REBEL

    • Fitment_Note: 50-State Legal
    • Liter: 5.6
    • SubModel: 550
    • EngineType: V8

    1968 MERCURY COMMUTER

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 390
    • EngineType: V8

    1969-1970 MERCURY MONTEREY

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: CUSTOM
    • EngineType: V8

    1971-1974 AMERICAN MOTORS HORNET

    • Fitment_Note: 50-State Legal
    • Liter: 5.0
    • SubModel: SPORTABOUT
    • EngineType: V8

    1968 FORD CUSTOM 500

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

    1970 MERCURY MONTEREY

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • EngineType: V8

    1987-1989 GMC V3500 PICKUP

    • Fitment_Note: 50-State Legal~Truck Motors Have .400 in. Taller Block~Use Appropriate Valve Locks; Retainers; Seals
    • Liter: 7.4
    • SubModel: SIERRA CLASSIC
    • EngineType: V8

    1972-1973 AMERICAN MOTORS JAVELIN

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

    1969 FORD LTD

    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 429
    • EngineType: V8

    1968 FORD RANCH WAGON

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8

    1963 MERCURY MONTEREY

    • Fitment_Note: 50-State Legal
    • EngineType: ALL
    • SubModel: S-55

    1975-1981 CHEVROLET C20 PICKUP

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

    1965-1966 FORD GALAXIE

    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • EngineType: V8

    1970 INTERNATIONAL PICKUP 1000D

    • Fitment_Note: 50-State Legal
    • Liter: 5.0
    • SubModel: BASE
    • EngineType: V8

    1992-1994 CHEVROLET K2500 SUBURBAN

    • Fitment_Note: 50-State Legal~Use Appropriate Valve Locks; Retainers; Seals
    • Liter: 7.4
    • SubModel: SILVERADO
    • EngineType: V8

    1969 MERCURY MARQUIS

    • CC: 7014
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: P
    • CUI: 428
    • EngineType: V8

    1968 MERCURY MONTCLAIR

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 390
    • EngineType: V8

    1974 GMC C25/C2500 SUBURBAN

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

    1970 FORD MUSTANG

    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: GRANDE
    • CUI: 428
    • EngineType: V8

    1974 CHEVROLET MALIBU

    • CC: 7439
    • Liter: 7.4
    • Aspiration: N
    • SubModel: ESTATE
    • Engine Vin: Y
    • CUI: 454
    • EngineType: V8

    1971 FORD CUSTOM 500

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • EngineType: V8

    1974-1976 JEEP CHEROKEE (SJ)

    • Fitment_Note: 50-State Legal
    • EngineType: V8
    • SubModel: S

    1975 FORD F-250

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: CUSTOM
    • EngineType: V8

    1966 MERCURY PARK LANE

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • EngineType: V8

    1987-1988 CHEVROLET R30 PICKUP

    • Fitment_Note: 50-State Legal~Use Appropriate Valve Locks; Retainers; Seals
    • Liter: 7.4
    • SubModel: CUSTOM DELUXE
    • EngineType: V8

    1963 FORD FORD 300

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

    1972 JEEP J-4800

    • Fitment_Note: 50-State Legal
    • Liter: 5.9
    • SubModel: BASE
    • EngineType: V8

    1970 CHEVROLET IMPALA

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

    1970 AMERICAN MOTORS REBEL

    • Fitment_Note: 50-State Legal
    • Liter: 5.9
    • SubModel: BASE
    • EngineType: V8

    1972 CHEVROLET KINGSWOOD

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

    1965-1966 FORD LTD

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • EngineType: V8

    1964 FORD CUSTOM 500

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • EngineType: V8

    1972 CHEVROLET CHEVELLE

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

    1968 FORD RANCHERO

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: GT
    • CUI: 390
    • EngineType: V8

    1970-1971 FORD LTD

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BROUGHAM
    • EngineType: V8

    1991-1992 CHEVROLET C2500 PICKUP

    • Fitment_Note: 50-State Legal~Use Appropriate Valve Locks; Retainers; Seals
    • Liter: 7.4
    • SubModel: SCOTTSDALE
    • EngineType: V8

    1974 GMC K25/K2500 PICKUP

    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454
    • EngineType: V8

    1965 MERCURY MONTCLAIR

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

    1968 MERCURY CYCLONE

    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8

    1969-1970 FORD CUSTOM

    • CC: 7030
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • EngineType: V8

    1965-1967 MERCURY COMET

    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • EngineType: V8

    1968 FORD LTD

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 390
    • EngineType: V8

    1964-1967 FORD FAIRLANE

    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • EngineType: V8

    1968 MERCURY COLONY PARK

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 390
    • EngineType: V8

    1970 CHEVROLET BISCAYNE

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

    1969 CHEVROLET C20 PICKUP

    • CC: 6489
    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8

    1968-1970 FORD CUSTOM

    • CC: 7014
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: P
    • CUI: 428
    • EngineType: V8

    1970-1971 CHEVROLET MONTE CARLO

    • CC: 7441
    • Liter: 7.4
    • SubModel: BASE
    • EngineType: V8

    1966 MERCURY BREEZEWAY

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • EngineType: V8

    1972-1974 AMERICAN MOTORS HORNET

    • CC: 5900
    • Fitment_Note: 50-State Legal
    • Liter: 5.9
    • SubModel: SPORTABOUT
    • EngineType: V8

    1968 MERCURY CYCLONE

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

    1973 CHEVROLET CHEVELLE

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

    1968 FORD COUNTRY SQUIRE

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 390
    • EngineType: V8

    1980-1981 CHEVROLET K30 PICKUP

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

    1968 MERCURY COUGAR

    • CC: 6997
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: XR-7
    • EngineType: V8

    1968 FORD TORINO

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: GT
    • EngineType: V8

    1968 FORD CUSTOM 500

    • CC: 6997
    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: W
    • CUI: 427
    • EngineType: V8

    1968 FORD COUNTRY SEDAN

    • CC: 6391
    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: X
    • CUI: 390
    • EngineType: V8

    1968-1969 MERCURY CYCLONE

    • Fitment_Note: 50-State Legal
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 390
    • EngineType: V8

    1965-1966 FORD LTD

    • Fitment_Note: 50-State Legal
    • Liter: 7.0
    • SubModel: BASE
    • EngineType: V8

    1967-1968 AMERICAN MOTORS REBEL

    • Fitment_Note: 50-State Legal
    • EngineType: V8
    • SubModel: 770

    1975 CHEVROLET MALIBU

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

    1992-1995 GMC C2500 SUBURBAN

    • Fitment_Note: 50-State Legal~Truck Motors Have .400 in. Taller Block
    • Liter: 7.4
    • SubModel: BASE
    • EngineType: V8

    1971 CHEVROLET BEL AIR

    • CC: 6588
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8

    1970 CHEVROLET MONTE CARLO

    • CC: 6588
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8

    1967-1970 CHEVROLET CAMARO

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

    1972 GMC C35/C3500 PICKUP

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

    1968 GMC K35/K3500 PICKUP

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

    1990 GMC R2500 SUBURBAN

    • Fitment_Note: 50-State Legal~Truck Motors Have .400 in. Taller Block
    • Liter: 7.4
    • SubModel: SLE
    • EngineType: V8
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