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COMP Cams Machined Steel Race Valve Locks Angle: 7°

COMP Cams 648-1

249-648-1

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Estimated to ship directly from the manufacturer on 06/25/18
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COMP Cams Machined Steel Race Valve Locks Angle: 7° $1.99
Machined Steel Race Valve Locks
  • Angle: 7°
  • Valve Stem: 5/16"
  • Single Groove
  • 1/pkg

  • COMP Cams 648-1 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
    Hardened steel
    Lock Style
    7 degree
    Manufacturing Process
    Machined
    Quantity
    Sold as a pair
    Recessed for Lash Cap
    No
    Valve Stem Diameter (in.)
    0.342
    Manufacturer's Part Number:
    648-1

    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 648-1 fit your vehicle?

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    1981 CHEVROLET CAPRICE

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

    1960-1966 GMC 3000 PICKUP

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

    1969 FORD FALCON

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

    1980-1981 FORD E-250 ECONOLINE CLUB WAGON

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

    1979-1982 GMC C2500 PICKUP

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

    1993 GMC K1500

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

    1992 CHEVROLET COMMERCIAL CHASSIS

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

    1975-1977 CHEVROLET C30 PICKUP

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

    1983-1984 PONTIAC FIREBIRD

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

    1988-1995 CHEVROLET C3500 PICKUP

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

    1979 CHEVROLET K10 SUBURBAN

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

    1975 CHEVROLET NOVA

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

    1969-1971 GMC C25/C2500 PICKUP

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

    1972 CHEVROLET CHEVELLE

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

    1986 PONTIAC BONNEVILLE

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

    1981 CHEVROLET IMPALA

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

    1987 CHEVROLET V10 PICKUP

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

    1987-1995 CHEVROLET G10 VAN

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

    1993 GMC G35/G3500 VAN

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

    1975-1979 FORD E-250 ECONOLINE CLUB WAGON

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

    1968-1969 CHEVROLET EL CAMINO

    • EngineType: ALL
    • SubModel: SS

    1982 FORD E-250 ECONOLINE

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

    1994-1995 CHEVROLET K1500 PICKUP

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

    1966-1969 CHEVROLET CAPRICE

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

    1989-1990 CHEVROLET CAPRICE

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

    1958-1959 GMC 250

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

    1983-1984 CHEVROLET G30 VAN

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

    1979 CHEVROLET CAMARO

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

    1979 CHEVROLET NOVA

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

    1974 CHEVROLET C10 SUBURBAN

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

    1987-1989 CHEVROLET G30 VAN

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

    1998 CHEVROLET K1500 PICKUP

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

    1980 CHEVROLET MALIBU

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

    1958-1967 PONTIAC LAURENTIAN

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

    1980-1982 PONTIAC PARISIENNE

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

    1998 GMC SAFARI

    • EngineType: ALL
    • SubModel: SLX

    1995-1998 GMC C1500 SUBURBAN

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

    1960 CHEVROLET C20 PICKUP

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

    1976 CHEVROLET G20 VAN

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

    1958 GMC PM252

    • EngineType: ALL
    • SubModel: ALL

    1991 OLDSMOBILE BRAVADA

    • EngineType: ALL
    • SubModel: ALL

    1987-1988 CHEVROLET R20 PICKUP

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

    1968-1969 CHEVROLET BEL AIR

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

    1987-1989 GMC V2500 SUBURBAN

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

    1982-1986 GMC C2500 SUBURBAN

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

    1978 GMC G25/G2500 VAN

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

    1973 CHEVROLET MALIBU

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

    1977-1979 FORD F-100

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

    1980-1981 CHEVROLET CORVETTE

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

    1988-1990 CHEVROLET BLAZER

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

    1969-1970 MERCURY CYCLONE

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

    1987 GMC R2500 PICKUP

    • Fitment_Note: w/OEM Hydraulic Roller Cams
    • Liter: 5.0
    • SubModel: HIGH SIERRA
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1977-1980 GMC C1500 PICKUP

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

    1960 CHEVROLET SUBURBAN

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

    1979 GMC G15/G1500 VAN

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

    1979-1982 GMC K3500 PICKUP

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

    1989-1991 CHEVROLET V3500 PICKUP

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

    1998 GMC K1500 PICKUP

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

    1979 OLDSMOBILE CUTLASS

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

    1969-1970 FORD FAIRLANE

    • CC: 5753
    • Liter: 5.8
    • Aspiration: N
    • SubModel: 500
    • Engine Vin: H
    • CUI: 351
    • EngineType: V8 ( 5.8 L / 351 )

    1976-1980 CHEVROLET C20 SUBURBAN

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

    1990 FORD BRONCO

    • EngineType: ALL
    • SubModel: XLT

    1989-1991 CHEVROLET V2500 SUBURBAN

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

    1978-1981 GMC C1500 PICKUP

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

    1980 CHEVROLET CAPRICE

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

    1973-1974 GMC C15/C1500 SUBURBAN

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

    1975-1976 MERCURY MONTEGO

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

    1995 GMC K1500 SUBURBAN

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

    1994 AM GENERAL HUMMER

    • EngineType: ALL
    • SubModel: BASE

    1979-1980 GMC K1500 SUBURBAN

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

    1995-1996 FORD F-250

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

    1972 CHEVROLET G10 VAN

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

    1975-1978 GMC K25 PICKUP

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

    1975-1980 CHEVROLET K20 PICKUP

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

    1968-1971 CHEVROLET CHEVELLE

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

    1973 GMC K25/K2500 PICKUP

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

    1975-1976 CHEVROLET MONZA

    • Liter: 4.3
    • SubModel: 2+2
    • CUI: 262
    • EngineType: V8 ( 4.3 L / 262 )

    1982-1984 CHEVROLET C10 PICKUP

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

    1987-1995 GMC G15/G1500 VAN

    • Fitment_Note: w/OEM Hydraulic Roller Cams
    • Liter: 5.0
    • SubModel: VANDURA
    • 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 )

    1967-1969 CHEVROLET CAMARO

    • EngineType: ALL
    • SubModel: SS

    1985 CHEVROLET C10 PICKUP

    • EngineType: ALL
    • SubModel: SCOTTSDALE

    1990 GMC V1500 SUBURBAN

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

    1989-1990 CHEVROLET V3500 PICKUP

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

    1981 CHEVROLET C20 PICKUP

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

    1977-1979 CHEVROLET C20 SUBURBAN

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

    1969 CHEVROLET K20 PICKUP

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

    1972 GMC C35/C3500 PICKUP

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

    1993 GMC SAFARI

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

    1983-1984 CHEVROLET K20 PICKUP

    • EngineType: ALL
    • SubModel: ALL

    1968 GMC C25/C2500 PICKUP

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

    1970 CHEVROLET CAMARO

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

    1982-1984 GMC C1500 PICKUP

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

    1982-1986 CHEVROLET C20 SUBURBAN

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

    1958-1959 GMC S300

    • CC: 5522
    • Liter: 5.5
    • SubModel: BASE
    • CUI: 337
    • EngineType: V8 ( 5.5 L / 337 )

    1980 CHEVROLET K30 PICKUP

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

    1985 CHEVROLET C10 SUBURBAN

    • EngineType: ALL
    • SubModel: CUSTOM

    1976 GMC SPRINT

    • Liter: 5.0
    • SubModel: SIERRA MADRE DEL SUR
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1985 CHEVROLET K10 PICKUP

    • EngineType: ALL
    • SubModel: SILVERADO

    1976 CHEVROLET IMPALA

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