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COMP Cams 648-16

Machined Steel Race Valve Locks Angle: 7°

COMP Cams 648-16
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Product images may differ from actual product appearance.

249-648-16

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COMP Cams 648-16 Machined Steel Race Valve Locks Angle: 7° $23.99
Machined Steel Race Valve Locks
  • Angle: 7°
  • Valve Stem: 11/32"
  • Single Groove
  • 16/pkg

  • COMP Cams 648-16 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 set of 32
    Recessed for Lash Cap
    No
    Valve Stem Diameter (in.)
    0.342
    Manufacturer's Part Number:
    648-16

    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 648-16 fit your vehicle?

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    1974 GMC K25/K2500 PICKUP

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

    1994-1998 GMC K2500 SUBURBAN

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

    1977-1978 CHEVROLET CAMARO

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

    1967-1968 CHEVROLET K10 PICKUP

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

    1979 CHEVROLET MALIBU

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

    1994-1998 GMC C2500 PICKUP

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

    1988-1995 GMC C2500 PICKUP

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

    1968-1969 CHEVROLET CHEVELLE

    • CC: 5031
    • Liter: 5.0
    • SubModel: 300 DELUXE
    • CUI: 307
    • EngineType: V8 ( 5.0 L / 307 )

    1987-1989 MERCURY GRAND MARQUIS

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

    1992-1996 FORD E-350 ECONOLINE CLUB WAGON

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

    1976-1978 GMC C25/C2500 PICKUP

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

    1983-1986 FORD F-350

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

    1978-1979 CHEVROLET G30 VAN

    • Liter: 4.8
    • SubModel: HI-CUBE
    • CUI: 292
    • EngineType: L6 ( 4.8 L / 292 )

    1995-1997 CHEVROLET K2500 SUBURBAN

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

    1988-1992 CHEVROLET C1500 PICKUP

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

    1958-1959 GMC S300

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

    1994-1995 GMC K2500 PICKUP

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

    1975-1978 GMC C25/C2500 PICKUP

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

    1960-1961 CHEVROLET K10 PICKUP

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

    1988-1995 CHEVROLET C2500 PICKUP

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

    1982-1983 GMC C3500 PICKUP

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

    1975 CHEVROLET K5 BLAZER

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

    1987 CHEVROLET G10 VAN

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

    1989 CHEVROLET R2500 PICKUP

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

    1972-1973 MERCURY MONTEGO

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

    1988-1990 CHEVROLET BLAZER

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

    1973-1974 GMC G35/G3500 VAN

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

    1975-1978 GMC K25 PICKUP

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

    1979 CHEVROLET MONZA

    • Liter: 5.0
    • SubModel: 2+2 SPORT
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1968-1969 CHEVROLET K20 SUBURBAN

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

    1988-1992 CHEVROLET C1500 PICKUP

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

    1975-1978 GMC C35/C3500 PICKUP

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

    1988-1993 CHEVROLET C3500 PICKUP

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

    1979 CHEVROLET K10 SUBURBAN

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

    1975-1979 FORD E-250 ECONOLINE CLUB WAGON

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

    1982 CHEVROLET K30 PICKUP

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

    1970 CHEVROLET BROOKWOOD

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

    1987-1989 GMC R2500 SUBURBAN

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

    1970 CHEVROLET EL CAMINO

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

    1982-1986 GMC C2500 SUBURBAN

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

    1979 CHEVROLET CAPRICE

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

    1985-1990 CHEVROLET ASTRO

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

    1967-1968 GMC K1500 PICKUP

    • CC: 5358
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.3 L / 327 )

    1967-1968 GMC C35/C3500 PICKUP

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

    1972 GMC SPRINT

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

    1976 CHEVROLET NOVA

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

    1983 FORD BRONCO

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

    1979-1980 CHEVROLET K10 PICKUP

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

    1975-1978 GMC C35/C3500 PICKUP

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

    1968 CHEVROLET CHEVELLE

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

    1979-1986 GMC K3500 PICKUP

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

    1981 CHEVROLET MALIBU

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

    1972-1975 GMC SPRINT

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

    1987-1996 GMC G35/G3500 VAN

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

    1972 CHEVROLET CAMARO

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

    1975-1976 CHEVROLET G30 VAN

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

    1975-1977 CHEVROLET C10 PICKUP

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

    1969-1974 MERCURY MONTEGO

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

    1981-1982 CHEVROLET C20 SUBURBAN

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

    1975-1977 MERCURY MONARCH

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

    1992 CHEVROLET COMMERCIAL CHASSIS

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

    1987-1988 CHEVROLET R20 PICKUP

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

    1982 CHEVROLET C20 SUBURBAN

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

    1979-1982 GMC CABALLERO

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

    1987-1989 GMC V3500 PICKUP

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

    1968 GMC K35/K3500 PICKUP

    • CC: 5358
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 327
    • EngineType: V8 ( 5.3 L / 327 )

    1961 CHEVROLET C20 PICKUP

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

    1998 OLDSMOBILE BRAVADA

    • EngineType: ALL
    • SubModel: ALL

    1977 CHEVROLET K30 PICKUP

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

    1977-1982 GMC G15/G1500 VAN

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

    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 )

    1986 PONTIAC FIREBIRD

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

    1985-1988 CHEVROLET MONTE CARLO

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

    1985 CHEVROLET G30 VAN

    • EngineType: ALL
    • SubModel: BEAUVILLE

    1982 CHEVROLET G30 VAN

    • CC: 5031
    • Liter: 5.0
    • SubModel: HI-CUBE
    • CUI: 305
    • EngineType: V8 ( 5.0 L / 305 )

    1986 CHEVROLET CAPRICE

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

    1994-1995 GMC G25/G2500 VAN

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

    1990 GMC V2500 SUBURBAN

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

    1988-1992 GMC K1500 PICKUP

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

    1983-1991 FORD E-250 ECONOLINE CLUB WAGON

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

    1982-1986 CHEVROLET K30 PICKUP

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

    1978 BUICK LESABRE

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

    1987-1988 CHEVROLET R20 PICKUP

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

    1974 CHEVROLET C10 SUBURBAN

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

    1988 CHEVROLET R20 PICKUP

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

    1998 GMC K1500 PICKUP

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

    1980 CHEVROLET K20 PICKUP

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

    1977-1979 FORD E-350 ECONOLINE CLUB WAGON

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

    1982 CHEVROLET C20 SUBURBAN

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

    1982-1986 GMC K3500 PICKUP

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

    1988-1995 CHEVROLET K2500 PICKUP

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

    1969-1970 CHEVROLET ESTATE

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

    1975-1980 CHEVROLET C10 PICKUP

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

    1977 GMC K25 SUBURBAN

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

    1975-1983 FORD E-100 ECONOLINE

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

    1979 CHEVROLET MONZA

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

    1979 GMC K1500 SUBURBAN

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

    1988 CHEVROLET K1500 PICKUP

    • EngineType: ALL
    • SubModel: BASE

    1998 GMC C1500 PICKUP

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

    1995-1998 GMC K1500 SUBURBAN

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