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COMP Cams 641-1

Machined Steel Race Valve Locks Angle: 7°

COMP Cams 641-1

249-641-1

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COMP Cams 641-1 Machined Steel Race Valve Locks Angle: 7° $2.69
Machined Steel Race Valve Locks
  • Angle: 7°
  • Valve Stem: 3/8"
  • Single Groove
  • 1/pkg

  • COMP Cams 641-1 Details

    Race 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
    Steel
    Lock Style
    7 degree
    Manufacturing Process
    Machined
    Quantity
    Sold as a pair
    Recessed for Lash Cap
    No
    Valve Stem Diameter (in.)
    0.372
    Manufacturer's Part Number:
    641-1

    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 641-1 fit your vehicle?

    Narrow Results

    1962 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1963 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • Aspiration: N
    • SubModel: VENTURA
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1959 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1976-1977 PONTIAC GRAND PRIX

    • Liter: 6.6
    • SubModel: SJ
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1981 PONTIAC GRAND PRIX

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 265
    • EngineType: V8 ( 4.3 L / 265 )

    1964 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1981 BUICK CENTURY

    • Liter: 4.3
    • SubModel: SPORT
    • CUI: 265
    • EngineType: V8 ( 4.3 L / 265 )

    1974 BUICK LESABRE

    • CC: 7456
    • Liter: 7.5
    • SubModel: LUXUS
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1967 PONTIAC EXECUTIVE

    • EngineType: ALL
    • SubModel: ALL

    1964 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • Aspiration: N
    • SubModel: VENTURA
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1968-1969 PONTIAC EXECUTIVE

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

    1972-1973 PONTIAC CATALINA

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: M
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977-1978 PONTIAC GRAND PRIX

    • Liter: 4.9
    • SubModel: BASE
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1957 PONTIAC BONNEVILLE

    • CC: 5687
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 347
    • EngineType: V8 ( 5.7 L / 347 )

    1974 PONTIAC FIREBIRD

    • CC: 6555
    • Liter: 6.6
    • SubModel: TRANS AM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1980 BUICK ELECTRA

    • Liter: 4.9
    • SubModel: ESTATE WAGON
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1974 PONTIAC FIREBIRD

    • CC: 6555
    • Liter: 6.6
    • SubModel: FORMULA
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1964 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1968 PONTIAC TEMPEST

    • CC: 5733
    • Liter: 5.7
    • SubModel: CUSTOM
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1978-1980 PONTIAC GRAND AM

    • Liter: 4.9
    • SubModel: BASE
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1977 PONTIAC FIREBIRD

    • Liter: 4.9
    • SubModel: ESPRIT
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1962 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1980-1981 PONTIAC GRAND LEMANS

    • Liter: 4.3
    • SubModel: SAFARI
    • CUI: 265
    • EngineType: V8 ( 4.3 L / 265 )

    1963 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1970-1971 PONTIAC FIREBIRD

    • CC: 5733
    • Liter: 5.7
    • SubModel: ESPRIT
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1977 PONTIAC VENTURA

    • Liter: 4.9
    • SubModel: SJ
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1977 PONTIAC VENTURA

    • Liter: 4.9
    • SubModel: BASE
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1964-1967 PONTIAC TEMPEST

    • CC: 5343
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 326
    • EngineType: V8 ( 5.3 L / 326 )

    1971 PONTIAC LEMANS

    • CC: 5733
    • Liter: 5.7
    • SubModel: T37
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1962 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • Aspiration: N
    • SubModel: VENTURA
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1975-1976 PONTIAC FIREBIRD

    • EngineType: ALL
    • SubModel: TRANS AM

    1970-1971 PONTIAC FIREBIRD

    • CC: 6555
    • Liter: 6.6
    • SubModel: FORMULA
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1977 PONTIAC GRAND LEMANS

    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: P
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1972-1974 PONTIAC FIREBIRD

    • CC: 5737
    • Liter: 5.7
    • SubModel: FORMULA
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1963-1964 PONTIAC CATALINA

    • CC: 6900
    • Liter: 6.9
    • SubModel: VENTURA
    • CUI: 421
    • EngineType: V8 ( 6.9 L / 421 )

    1980 PONTIAC GRAND PRIX

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 265
    • EngineType: V8 ( 4.3 L / 265 )

    1977 PONTIAC FIREBIRD

    • Liter: 5.7
    • Aspiration: N
    • SubModel: FORMULA
    • Engine Vin: P
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1971 PONTIAC FIREBIRD

    • CC: 7456
    • Liter: 7.5
    • SubModel: FORMULA
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1975-1977 PONTIAC GRAND LEMANS

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1980 PONTIAC LEMANS

    • Liter: 4.9
    • SubModel: SAFARI
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1981 PONTIAC GRAND PRIX

    • Liter: 4.3
    • SubModel: BROUGHAM
    • CUI: 265
    • EngineType: V8 ( 4.3 L / 265 )

    1964-1965 PONTIAC TEMPEST

    • CC: 5343
    • Liter: 5.3
    • SubModel: CUSTOM
    • CUI: 326
    • EngineType: V8 ( 5.3 L / 326 )

    1970-1971 PONTIAC LEMANS

    • CC: 6555
    • Liter: 6.6
    • SubModel: SPORT
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1972 PONTIAC CATALINA

    • CC: 7456
    • Liter: 7.5
    • SubModel: BROUGHAM
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1980 PONTIAC LEMANS

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 265
    • EngineType: V8 ( 4.3 L / 265 )

    1977 PONTIAC LEMANS

    • Liter: 4.9
    • SubModel: SPORT
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1964 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • SubModel: SAFARI
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1964 PONTIAC CATALINA

    • CC: 6900
    • Liter: 6.9
    • Aspiration: N
    • SubModel: BASE
    • CUI: 421
    • EngineType: V8 ( 6.9 L / 421 )

    1976-1977 PONTIAC GRAND PRIX

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1973-1974 PONTIAC GRAND SAFARI

    • CC: 7457
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1972-1974 PONTIAC FIREBIRD

    • CC: 5737
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1980-1981 BUICK REGAL

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 265
    • EngineType: V8 ( 4.3 L / 265 )

    1974 PONTIAC LEMANS

    • CC: 7456
    • Liter: 7.5
    • Aspiration: N
    • SubModel: SPORT
    • Engine Vin: Y
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1956 PONTIAC CHIEFTAIN

    • CC: 5179
    • Liter: 5.2
    • SubModel: BASE
    • CUI: 316
    • EngineType: V8 ( 5.2 L / 316 )

    1976 PONTIAC LEMANS

    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1962 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1972-1974 PONTIAC FIREBIRD

    • CC: 7456
    • Liter: 7.5
    • Aspiration: N
    • SubModel: TRANS AM
    • Engine Vin: X
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1972 BUICK LESABRE

    • CC: 7456
    • Liter: 7.5
    • Aspiration: N
    • SubModel: CUSTOM
    • Engine Vin: W
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1959 PONTIAC BONNEVILLE

    • EngineType: ALL
    • SubModel: BASE

    1959 PONTIAC BONNEVILLE

    • EngineType: ALL
    • SubModel: CUSTOM

    1963-1964 PONTIAC TEMPEST

    • CC: 5343
    • Liter: 5.3
    • SubModel: SAFARI
    • CUI: 326
    • EngineType: V8 ( 5.3 L / 326 )

    1964-1966 PONTIAC GTO

    • CC: 6376
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1962 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1962 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • Aspiration: N
    • SubModel: BASE
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1977-1980 PONTIAC CATALINA

    • Liter: 4.9
    • SubModel: BASE
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1968 PONTIAC TEMPEST

    • CC: 6555
    • Liter: 6.6
    • SubModel: CUSTOM
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979-1980 BUICK CENTURY

    • Liter: 4.9
    • SubModel: SPORT
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1972-1973 PONTIAC FIREBIRD

    • CC: 6555
    • Liter: 6.6
    • Aspiration: N
    • SubModel: FORMULA
    • Engine Vin: T
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1964 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • Aspiration: N
    • SubModel: VENTURA
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1958 PONTIAC STAR CHIEF

    • EngineType: ALL
    • SubModel: SUPER DELUXE

    1975-1976 PONTIAC FIREBIRD

    • Liter: 5.7
    • SubModel: ESPRIT
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1972 PONTIAC GRAND SAFARI

    • CC: 7457
    • Liter: 7.5
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: U
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1974 PONTIAC VENTURA

    • CC: 5733
    • Liter: 5.7
    • SubModel: GTO
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1970-1971 PONTIAC BONNEVILLE

    • CC: 6555
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1957 PONTIAC CHIEFTAIN

    • EngineType: ALL
    • SubModel: CUSTOM SAFARI

    1980-1981 PONTIAC BONNEVILLE

    • Liter: 4.3
    • SubModel: BROUGHAM
    • CUI: 265
    • EngineType: V8 ( 4.3 L / 265 )

    1977 PONTIAC LEMANS

    • Liter: 4.9
    • SubModel: SAFARI
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1972-1974 OLDSMOBILE TORONADO

    • EngineType: ALL
    • SubModel: ALL

    1970-1972 PONTIAC BONNEVILLE

    • CC: 7456
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1973 PONTIAC LEMANS

    • CC: 6555
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1981 PONTIAC LEMANS

    • Liter: 4.3
    • SubModel: BASE
    • CUI: 265
    • EngineType: V8 ( 4.3 L / 265 )

    1974 OLDSMOBILE CUTLASS

    • CC: 5737
    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: M
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1973 PONTIAC LEMANS

    • CC: 7457
    • Liter: 7.5
    • SubModel: SAFARI
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1979 BUICK CENTURY

    • Liter: 4.9
    • SubModel: CUSTOM
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1972-1974 PONTIAC GRAND PRIX

    • CC: 6556
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1968 PONTIAC TEMPEST

    • CC: 6555
    • Liter: 6.6
    • SubModel: SAFARI
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979-1980 PONTIAC LEMANS

    • Liter: 4.9
    • SubModel: BASE
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1974 PONTIAC GRAND PRIX

    • CC: 7456
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1980 PONTIAC GRAND PRIX

    • Liter: 4.3
    • SubModel: LJ
    • CUI: 265
    • EngineType: V8 ( 4.3 L / 265 )

    1970-1972 PONTIAC GRAND PRIX

    • CC: 7456
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1972 PONTIAC GRAND SAFARI

    • CC: 7457
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1963 PONTIAC CATALINA

    • CC: 6900
    • Liter: 6.9
    • Aspiration: N
    • SubModel: BASE
    • CUI: 421
    • EngineType: V8 ( 6.9 L / 421 )

    1977 PONTIAC GRAND PRIX

    • Liter: 5.7
    • Aspiration: N
    • SubModel: LJ
    • Engine Vin: P
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1972-1974 PONTIAC FIREBIRD

    • CC: 7456
    • Liter: 7.5
    • Aspiration: N
    • SubModel: FORMULA
    • Engine Vin: X
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )

    1962 PONTIAC CATALINA

    • CC: 6376
    • Liter: 6.4
    • Aspiration: N
    • SubModel: VENTURA
    • CUI: 389
    • EngineType: V8 ( 6.4 L / 389 )

    1974 PONTIAC CATALINA

    • CC: 6555
    • Liter: 6.6
    • Aspiration: N
    • SubModel: SAFARI
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1972-1973 PONTIAC FIREBIRD

    • CC: 6555
    • Liter: 6.6
    • Aspiration: N
    • SubModel: ESPRIT
    • Engine Vin: R
    • CUI: 400
    • EngineType: V8 ( 6.6 L / 400 )

    1979 OLDSMOBILE DELTA 88

    • Liter: 4.9
    • SubModel: BASE
    • CUI: 301
    • EngineType: V8 ( 4.9 L / 301 )

    1977 PONTIAC GRAND PRIX

    • Liter: 5.7
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: P
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1972-1973 PONTIAC LEMANS

    • CC: 7457
    • Liter: 7.5
    • SubModel: BASE
    • CUI: 455
    • EngineType: V8 ( 7.5 L / 455 )
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