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COMP Cams Machined Steel Race Valve Locks Angle: 7°

COMP Cams 648-100

249-648-100

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COMP Cams Machined Steel Race Valve Locks Angle: 7° $132.99
Machined Steel Race Valve Locks
  • Angle: 7°
  • Valve Stem: 5/16"
  • Single Groove
  • 100/pkg

  • COMP Cams 648-100 Details

    Race Valve Locks

  • 7° lock angle

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

  • Specifications:

    Lock Angle
    7 Deg.
    Manufacturer's Part Number:
    648-100

    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 648-100 fit your vehicle?

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    Aspiration

    1979 CHEVROLET EL CAMINO

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

    1976 PONTIAC LEMANS

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1981 CHEVROLET C20 PICKUP

    • CC: 5031
    • Liter: 5.0
    • SubModel: DELUXE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1970-1971 FORD TORINO

    • CC: 5753
    • Liter: 5.8
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: M
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1991 CHEVROLET S10 PICKUP

    • Liter: 4.3
    • SubModel: BAJA
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1960-1962 GMC 1000 SERIES PICKUP

    • CC: 4425
    • Liter: 4.4
    • SubModel: BASE
    • CUI: 270
    • EngineType: L6 ( 4.4 L / 270 )

    1995 GMC K1500 SUBURBAN

    • Fitment_Note: w/OEM Hydraulic Roller Cams
    • Liter: 5.7
    • SubModel: SLE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1978-1979 OLDSMOBILE OMEGA

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

    1992-1996 FORD E-150 ECONOLINE CLUB WAGON

    • Liter: 5.8
    • SubModel: CHATEAU
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1967 CHEVROLET C10 SUBURBAN

    • CC: 4638
    • Liter: 4.6
    • SubModel: BASE
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1979-1980 CHEVROLET K10 SUBURBAN

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

    1964-1967 PONTIAC ACADIAN

    • CC: 4638
    • Liter: 4.6
    • SubModel: BASE
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1985-1986 CHEVROLET CAMARO

    • EngineType: ALL
    • SubModel: IROC-Z

    1994 CHEVROLET BLAZER

    • Fitment_Note: w/OEM Hydraulic Roller Cams
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1995-1997 GMC YUKON

    • Liter: 6.5
    • SubModel: SLT
    • CUI: 395
    • EngineType: V8 ( 6.5 L / 395 )

    1969-1974 FORD CUSTOM 500

    • CC: 5753
    • Liter: 5.8
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1971 MERCURY CYCLONE

    • CC: 5752
    • Liter: 5.8
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: M
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1980 PONTIAC GRAND LEMANS

    • EngineType: ALL
    • SubModel: LE

    1995-1998 CHEVROLET K2500 SUBURBAN

    • Liter: 6.5
    • SubModel: LS
    • CUI: 395
    • EngineType: V8 ( 6.5 L / 395 )

    1982-1986 GMC C2500 SUBURBAN

    • Liter: 6.2
    • SubModel: BASE
    • CUI: 379
    • EngineType: V8 ( 6.2 L / 379 )

    1995 FORD F-350

    • CC: 5752
    • Liter: 5.8
    • SubModel: XL
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1979 CHEVROLET MALIBU

    • Liter: 4.4
    • SubModel: POLICE
    • CUI: 267
    • EngineType: V8 ( 4.4 L / 267 )

    1972 CHEVROLET CHEVELLE

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

    1989-1991 CHEVROLET V3500 PICKUP

    • Liter: 6.2
    • SubModel: SILVERADO
    • CUI: 379
    • EngineType: V8 ( 6.2 L / 379 )

    1985 CHEVROLET K10 SUBURBAN

    • EngineType: ALL
    • SubModel: SCOTTSDALE

    1994-1997 GMC C1500 PICKUP

    • Liter: 6.5
    • SubModel: SIERRA SL
    • CUI: 395
    • EngineType: V8 ( 6.5 L / 395 )

    1976-1978 CHEVROLET MONZA

    • CC: 5031
    • Liter: 5.0
    • SubModel: 2+2 SPYDER
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1979-1981 GMC C1500 SUBURBAN

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1987-1989 GMC R2500 PICKUP

    • Fitment_Note: w/OEM Hydraulic Roller Cams
    • Liter: 5.7
    • SubModel: SIERRA CLASSIC
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1981-1984 CHEVROLET G20 VAN

    • CC: 5031
    • Liter: 5.0
    • SubModel: SPORTVAN
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1995 GMC K1500 SUBURBAN

    • Fitment_Note: w/OEM Hydraulic Roller Cams
    • Liter: 5.7
    • SubModel: SLT
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1973 CHEVROLET K10 PICKUP

    • CC: 5736
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1972-1974 FORD GRAN TORINO

    • CC: 5753
    • Liter: 5.8
    • Aspiration: N
    • SubModel: SQUIRE
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1985-1986 GMC K2500 SUBURBAN

    • EngineType: ALL
    • SubModel: HIGH SIERRA

    1992-1998 CHEVROLET C3500 PICKUP

    • Liter: 6.5
    • SubModel: CHEYENNE
    • CUI: 395
    • EngineType: V8 ( 6.5 L / 395 )

    1991-1993 BUICK ROADMASTER

    • Fitment_Note: w/OEM Hydraulic Roller Cams
    • EngineType: ALL
    • SubModel: ESTATE WAGON

    1968 CHEVROLET C10 SUBURBAN

    • Liter: 5.4
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.4 L / 327 )

    1961-1966 CHEVROLET K20 PICKUP

    • CC: 4638
    • Liter: 4.6
    • SubModel: BASE
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1968-1969 CHEVROLET EL CAMINO

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

    1970-1971 AVANTI II

    • EngineType: ALL
    • SubModel: ALL

    1995-1998 CHEVROLET TAHOE

    • Liter: 6.5
    • SubModel: LS
    • CUI: 395
    • EngineType: V8 ( 6.5 L / 395 )

    1975-1980 CHEVROLET C20 SUBURBAN

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

    1970-1971 CHEVROLET G10 VAN

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

    1981-1984 CHEVROLET K10 PICKUP

    • CC: 5031
    • Liter: 5.0
    • SubModel: SILVERADO
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1958-1959 GMC 370

    • CC: 6064
    • Liter: 6.1
    • SubModel: BASE
    • CUI: 370
    • EngineType: V8 ( 6.1 L / 370 )

    1972-1974 CHEVROLET K20 SUBURBAN

    • Liter: 4.8
    • SubModel: BASE
    • CUI: 292
    • EngineType: L6 ( 4.8 L / 292 )

    1972-1974 MERCURY MONTEGO

    • CC: 5753
    • Liter: 5.8
    • Aspiration: N
    • SubModel: MX
    • Engine Vin: Q
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1992 GMC G35/G3500 VAN

    • Liter: 6.2
    • Aspiration: N
    • SubModel: RALLY
    • Engine Vin: J
    • CUI: 379
    • EngineType: V8 ( 6.2 L / 379 )

    1979-1986 GMC C2500 PICKUP

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

    1974 CHEVROLET C30 PICKUP

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

    1963 CHEVROLET K10 PICKUP

    • CC: 4801
    • Liter: 4.8
    • SubModel: BASE
    • CUI: 292
    • EngineType: L6 ( 4.8 L / 292 )

    1987 FORD E-150 ECONOLINE CLUB WAGON

    • EngineType: ALL
    • SubModel: XL

    1959-1967 PONTIAC PARISIENNE

    • CC: 4638
    • Liter: 4.6
    • SubModel: BASE
    • CUI: 283
    • EngineType: V8 ( 4.6 L / 283 )

    1973 CHEVROLET EL CAMINO

    • CC: 5031
    • Liter: 5.0
    • SubModel: CUSTOM
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1968-1969 CHEVROLET EL CAMINO

    • CC: 5736
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1975-1978 GMC C25 SUBURBAN

    • Liter: 4.8
    • SubModel: BASE
    • CUI: 292
    • EngineType: L6 ( 4.8 L / 292 )

    1977 OLDSMOBILE DELTA 88

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

    1987 CHEVROLET G10 VAN

    • Fitment_Note: w/OEM Hydraulic Roller Cams
    • Liter: 5.7
    • SubModel: BONAVENTURE
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1991 CHEVROLET R1500 SUBURBAN

    • Fitment_Note: w/OEM Hydraulic Roller Cams
    • Liter: 5.7
    • SubModel: SILVERADO
    • CUI: 350
    • EngineType: V8 ( 5.7 L / 350 )

    1979-1986 GMC C2500 PICKUP

    • Liter: 5.0
    • SubModel: HIGH SIERRA
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1979 CHEVROLET BLAZER K5

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

    1977 MERCURY COUGAR

    • Liter: 5.8
    • Aspiration: N
    • SubModel: VILLAGER
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1987 CHEVROLET G10 VAN

    • CC: 5031
    • Fitment_Note: w/OEM Hydraulic Roller Cams
    • Liter: 5.0
    • SubModel: BONAVENTURE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1977-1978 CHEVROLET K5 BLAZER

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

    1970-1971 FORD MUSTANG

    • CC: 5753
    • Liter: 5.8
    • Aspiration: N
    • SubModel: GRANDE
    • Engine Vin: M
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1991 CHEVROLET COMMERCIAL CHASSIS

    • Fitment_Note: w/OEM Hydraulic Roller Cams
    • EngineType: ALL
    • SubModel: ALL

    1978-1981 GMC C1500 PICKUP

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

    1980 CHEVROLET G20 VAN

    • Liter: 5.0
    • SubModel: BEAUVILLE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1969-1972 CHEVROLET CHEVELLE

    • CC: 5031
    • Liter: 5.0
    • SubModel: CONCOURS ESTATE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1977-1979 CHEVROLET K10 PICKUP

    • CC: 5031
    • Liter: 5.0
    • SubModel: CHEYENNE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1968 GMC K35/K3500 PICKUP

    • CC: 4801
    • Liter: 4.8
    • SubModel: BASE
    • CUI: 292
    • EngineType: L6 ( 4.8 L / 292 )

    1977-1979 FORD F-250

    • Liter: 5.8
    • Aspiration: N
    • SubModel: CUSTOM
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1988-1995 CHEVROLET C2500 PICKUP

    • CC: 5031
    • Fitment_Note: w/OEM Hydraulic Roller Cams
    • Liter: 5.0
    • SubModel: SILVERADO
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1972 CHEVROLET TOWNSMAN

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

    1969 MERCURY COUGAR

    • CC: 5753
    • Liter: 5.8
    • SubModel: XR-7
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1978-1979 GMC CABALLERO

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

    1975-1984 GMC K1500 PICKUP

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

    1977 CHEVROLET K30 PICKUP

    • Liter: 4.8
    • SubModel: SILVERADO
    • CUI: 292
    • EngineType: L6 ( 4.8 L / 292 )

    1958-1959 GMC PM250

    • CC: 6064
    • Liter: 6.1
    • SubModel: BASE
    • CUI: 370
    • EngineType: V8 ( 6.1 L / 370 )

    1970 CHEVROLET BLAZER

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1993 GMC SONOMA

    • Liter: 4.3
    • SubModel: SLS
    • CUI: 262
    • EngineType: V6 ( 4.3 L / 262 )

    1986 PONTIAC FIREBIRD

    • Liter: 5.0
    • SubModel: S/E
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1991-1996 FORD E-350 ECONOLINE CLUB WAGON

    • Liter: 5.8
    • SubModel: XLT
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1979-1983 GMC C3500 PICKUP

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

    1977 BUICK CENTURY

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1976-1978 GMC C35/C3500 PICKUP

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

    1982 OLDSMOBILE CUTLASS SUPREME

    • Liter: 4.4
    • SubModel: BASE
    • CUI: 267
    • EngineType: V8 ( 4.4 L / 267 )

    1975 FORD GRAN TORINO

    • Liter: 5.8
    • Aspiration: N
    • SubModel: SPORT
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1987-1989 GMC R2500 PICKUP

    • Liter: 6.2
    • SubModel: HIGH SIERRA
    • CUI: 379
    • EngineType: V8 ( 6.2 L / 379 )

    1980 CHEVROLET G30 VAN

    • EngineType: ALL
    • SubModel: CHEVY VAN

    1977-1979 CHEVROLET K10 SUBURBAN

    • CC: 5031
    • Liter: 5.0
    • SubModel: SCOTTSDALE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1987-1988 CHEVROLET MONTE CARLO

    • CC: 5031
    • Fitment_Note: w/OEM Hydraulic Roller Cams
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1970-1971 CHEVROLET G30 VAN

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

    1979 CHEVROLET IMPALA

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

    1968 CHEVROLET C20 PICKUP

    • Liter: 5.4
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.4 L / 327 )

    1960 CHEVROLET C30 PICKUP

    • CC: 5704
    • Liter: 5.7
    • SubModel: BASE
    • CUI: 348
    • EngineType: V8 ( 5.7 L / 348 )

    1958-1959 GMC M300

    • CC: 6064
    • Liter: 6.1
    • SubModel: BASE
    • CUI: 370
    • EngineType: V8 ( 6.1 L / 370 )

    1981-1982 CHEVROLET K10 SUBURBAN

    • EngineType: ALL
    • SubModel: CUSTOM

    1978-1979 PONTIAC PHOENIX

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

    1982 CHEVROLET C20 SUBURBAN

    • Liter: 6.2
    • SubModel: SCOTTSDALE
    • CUI: 379
    • EngineType: V8 ( 6.2 L / 379 )
    Items You Need
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