COMP Cams

COMP Cams Valve Locks 3/8in Single Groove

SKU 603-16

MPN cca603-16

$51.95 · Available to order

COMP Cams Valve Locks 3/8in Single Groove

lock angle and 3/8" valve stem size is a perfect replacement lock for stock engine rebuilds. It is recommended only for street Applications with lighter valve spring loads. It is critically important to make sure valve locks match the 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 fit together without a gap, they are too large. If the locks fit tight to the stem and leave a gap between the middle of the lock and the OD of the stem, the locks are too small. Most people believe that the tang inside a valve lock Oldsmobile the retainer and valve spring in place while the engine is running. This is not the case. The cross-section of material in the tang is not strong enough to withstand open spring loads of 1000 lbs. or more. The sole purpose of the tang 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 a "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.

Confirmed vehicle fitment
YearsMakeModelSubmodelDrive
1990ChevroletC1500Scottsdale—
1989ChevroletR2500Cheyenne—
1979–1986GMCC2500Base—
1988ChevroletV30Cheyenne—
1988–1992ChevroletC3500Scottsdale—
1976ChevroletCapriceClassic Estate—
1972–1975JeepCJ6Base—
1988–1993GMCC3500Sierra—
1987–1988ChevroletV20 SuburbanSilverado—
1975–1978GMCC25 SuburbanHigh Sierra—
1968–1974GMCC35/C3500 PickupBase—
1974–1975ChevroletMalibuClassic—
1969American MotorsRamblerBase—
1968–1969MercuryMontegoMX—
1963–1964FordGalaxie 500Sunliner—
1974–1983JeepCherokeeBase—
1970International1300DBase—
1979–1980GMCK1500Sierra Grande—
1994–1995ChevroletC2500Base—
1970International1200DBase—
1964–1968MercuryMontclairBase—
1972–1973International1010Travelall—
1981–1986ChevroletC30Custom—
1968–1974ChevroletC20 PickupBase—
1981–1986ChevroletC20 SuburbanCustom—
1979–1986GMCK3500High Sierra—
1988–1995ChevroletC3500Silverado—
1979–1982GMCC2500Sierra Grande—
1992–1995GMCC2500 SuburbanBase—
1971–1974American MotorsJavelinAMX—
1968American MotorsAmerican440—
1991–1995ChevroletC2500Silverado—
1980ChevroletK20Cheyenne—
1972–1973JeepJ-2500Base—
1975–1981ChevroletC20Cheyenne—
1965–1971FordLTDBase—
1976–1977GMCK25 SuburbanSierra Classic—
1971–1974InternationalScout IIBase—
1968FordMustangShelby GT-500KR—
1988–1993GMCK3500Sierra SLX—
1975–1978GMCC15 SuburbanHigh Sierra—
1979American MotorsPacerLimited—
1979–1980GMCC1500 SuburbanHigh Sierra—
1968GMCK15/K1500 SuburbanBase—
1991–1995GMCK2500Sierra SLE—
1974International200Travelall—
1976American MotorsGremlinCustom—
1975InternationalScout IIXLC—
1976–1978GMCK25Base—
1981–1986ChevroletC20Custom—
1978–1979American MotorsAMXBase—
1979–1980ChevroletK10Custom Deluxe—
1975ChevroletLagunaS3—
1975–1978GMCC25 SuburbanSierra Grande—
1973–1974GMCK25/K2500 PickupBase—
1979American MotorsConcordLimited—
1979American MotorsPacerDL—
1984–1986ChevroletC20 SuburbanScottsdale—
1979–1986GMCK3500Base—
1975–1986ChevroletC20Scottsdale—
1972–1973International1010Base—
1988–1996ChevroletG30Chevy Van—
1973ChevroletBlazerBase—
1974–1975International200Base—
1979–1986GMCC2500 SuburbanHigh Sierra—
1994–1995ChevroletC2500WT—
1989–1991ChevroletR3500Silverado—
1968–1974ChevroletC30 PickupBase—
1979–1986GMCK3500Sierra Classic—
1990–1993ChevroletC1500Cheyenne—
1968–1974ChevroletEl CaminoCustom—
1968ChevroletChevy IINova—
1976ChevroletImpalaCustom Landau—
1975–1976FordF-100Northland—
1979–1986GMCC2500High Sierra—
1990–1993ChevroletC1500WT—
1975–1976FordF-250Northland—
1978–1980ChevroletC10Big Ten—
1987–1988ChevroletR20Custom Deluxe—
1978GMCC15Street Coupe—
1989–1990ChevroletR3500Scottsdale—
1987–1989GMCR2500 SuburbanSierra Classic—
1971FordM-400Base—
1987–1989GMCR3500High Sierra—
1967–1968American MotorsRebel550—
1968–1974ChevroletEl CaminoSS—
1973ChevroletLagunaEstate—
1975–1980ChevroletC30Custom Deluxe—
1975GMCSprintClassic—
1976GMCJimmyBase—
1975–1978GMCC35Sierra Classic—
1989–1996GMCG3500Rally Camper Special—
1979American MotorsConcordDL—
1975–1980ChevroletC10Cheyenne—
1972ChevroletTownsmanBase—
1972–1973International1310Base—
1978American MotorsPacerBase—
1987–1988ChevroletV30Silverado—
1974ChevroletLagunaType S-3—
1989ChevroletR2500Silverado—
1968–1974ChevroletC20 SuburbanBase—
1972–1975American MotorsGremlinBase—
1979–1986GMCC2500Sierra Classic—
1965–1967MercuryCalienteBase—
1979–1986GMCC3500Base—
1973–1974ChevroletMalibuBase—
1968–1972ChevroletChevelleMalibu—
1975–1976ChevroletCapriceClassic Sport—
1989–1991ChevroletR2500 SuburbanScottsdale—
1970–1974ChevroletMonte CarloBase—
1975–1976FordF-100Custom—
1991–1992ChevroletK2500Scottsdale—
1979–1980GMCC1500Street Coupe—
1994–1995ChevroletK3500Base—
1975–1978GMCC15Base—
1967–1970MercuryCougarBase—
1976–1981JeepCJ7Renegade—
1967–1972ChevroletChevelleConcours—
1979–1982GMCK3500Sierra Grande—
1976–1978ChevroletK20Custom Deluxe—
1989–1996GMCG3500Rally STX—
1979–1980ChevroletC20 SuburbanSilverado—
1968–1969FordRancheroGT—
1980–1986ChevroletK30Silverado—
1968–1972ChevroletChevelleNomad—
1968–1974GMCC25/C2500 PickupBase—
1976FordF-250Base—
1990–1991GMCR3500SLE—
1976ChevroletG20Beauville—
1980ChevroletK20Silverado—
1979–1980GMCC1500Base—
1975–1980ChevroletC10 SuburbanSilverado—
1988–1995ChevroletK3500Cheyenne—
1976ChevroletK5 BlazerBase—
1991–1995ChevroletK2500Cheyenne—
1972–1973JeepJ-2600Base—
1975–1980ChevroletC10Silverado—
1973–1975ChevroletLagunaBase—
1966–1967FordFairlane500XL—
1991–1995ChevroletK2500Silverado—
1973International1210Travelall—
1987ChevroletV20 SuburbanCustom Deluxe—
1969American MotorsRambler440—
1975–1976GMCG25Rally STX—
1977ChevroletK30Cheyenne—
1988–1995ChevroletK3500Silverado—
1975–1986ChevroletC30Silverado—
1968–1969GMCK15/K1500 PickupBase—
1965–1967FordF-250Base—
1994–1995GMCK3500Sierra SL—
1970FordMustangGrande—
1975–1978GMCC25High Sierra—
1973FordM-400Base—
1987–1988ChevroletV30Scottsdale—
1968–1969FordTorinoGT—
1968–1970American MotorsAmbassadorBase—
1976GMCG35Magnavan—
1994–1995ChevroletC3500Base—
1988–1995GMCC3500Sierra SLE—
1975–1976FordF-250Ranger—
1979–1980GMCC1500Sierra Classic—
1967–1970MercuryCougarXR-7—
1994–1995GMCK3500Sierra SLT—
1979–1980GMCC1500 SuburbanSierra Grande—
1968–1969GMCK25/K2500 PickupBase—
1975International150Base—
1968–1969ChevroletK10 PickupBase—
1971–1974GMCSprintBase—
1979–1982GMCC2500 SuburbanSierra Grande—
1974ChevroletK10 PickupBase—
1970International1000DBase—
1975–1981ChevroletC30Cheyenne—
1989ChevroletR2500Scottsdale—
1979–1986GMCC2500 SuburbanBase—
1963Ford300Base—
1982–1986ChevroletC20 SuburbanSilverado—
1973–1974ChevroletG30 VanBase—
1976–1977GMCK25 SuburbanHigh Sierra—
1975–1978GMCC15 SuburbanSierra Classic—
1975ChevroletCapriceEstate Wagon—
1970InternationalScoutBase—
1975–1978GMCC35High Sierra—
1992–1995GMCC2500 SuburbanSLE—
1978–1979American MotorsConcordBase—
1976–1978InternationalScout IITraveler—
1987–1989GMCR2500High Sierra—
1974American MotorsMatadorBrougham—
1980–1981ChevroletK30Cheyenne—
1975–1980ChevroletC10Custom Deluxe—
1988–1996ChevroletG30Beauville—
1979–1986GMCC3500High Sierra—
1982–1983JeepWagoneerBrougham—
1963MercuryMontereyS-55—
1968–1972ChevroletK10 SuburbanBase—
1966–1967ChevroletMalibuBase—
1975–1976FordF-150Ranger XLT—
1972–1974GMCSprintCustom—
1967–1970FordMustangBase—
1976ChevroletCapriceClassic Landau—
1968GMCK25/K2500 SuburbanBase—
1973–1974ChevroletMalibuEstate—
1970InternationalM800 Post OfficeBase—
1987–1991GMCR2500 SuburbanBase—
1964–1968MercuryCommuterBase—
1981–1982JeepCherokeeChief—
1979American MotorsSpiritBase—
1973–1974ChevroletK30 PickupBase—
1970–1971American MotorsHornetBase—
1964–1971FordCustomBase—
1976ChevroletK10Silverado—
1992–1995GMCK2500 SuburbanBase—
1994–1995ChevroletK2500WT—
1979–1980GMCK1500Base—
1970–1972ChevroletKingswoodBase—
1995GMCK2500 SuburbanSLT—
1969MercuryCycloneSpoiler—
1975–1978GMCC25Sierra Classic—
1979–1980GMCC1500 SuburbanBase—
1968–1970FordMustangShelby GT-500—
1975–1976FordF-150Custom—
1979–1980GMCC1500High Sierra—
1968–1971ChevroletK30 PickupBase—
1975–1978GMCC25 SuburbanSierra Classic—
1981ChevroletK30Deluxe—
1980ChevroletK20Scottsdale—
1968–1972American MotorsAmbassadorSST—
1975–1976ChevroletImpalaSport—
1968–1971American MotorsAmbassadorDPL—
1967–1970MercuryMarquisBase—
1974–1988JeepJ10Base—
1970American MotorsJavelinSST Mark Donohue—
1975–1978GMCC35Base—
1976–1978GMCK25Sierra Grande—
1963–1971FordCountry SquireBase—
1994–1995GMCK2500Sierra SLT—
1975–1976ChevroletG30Chevy Van—
1989–1991ChevroletR3500Cheyenne—
1975–1978GMCC25Sierra Grande—
1975–1976ChevroletG30Beauville—
1968ChevroletChevelle300—
1976ChevroletK10Custom Deluxe—
1965–1976ChevroletImpalaBase—
1975–1976FordF-100Ranger—
1968–1974GMCC15/C1500 PickupBase—
1973–1977American MotorsHornetBase—
1975–1980ChevroletC20 SuburbanScottsdale—
1992–1995ChevroletK2500 SuburbanBase—
1974International100Base—
1980–1981JeepCJ5Laredo—
1965–1967ChevroletChevelleBase—
1990–1993ChevroletC1500454 SS—
1980–1981JeepCJ7Laredo—
1966–1967American MotorsMarlinBase—
1980ChevroletK30Custom Deluxe—
1995ChevroletC2500 SuburbanLT—
1975–1976FordF-350Custom—
1974–1988JeepJ20Base—
1964–1970FordFairlane500—
1978–1980JeepCherokeeWide Track—
1963–1964FordGalaxie 500Victoria—
1965–1972ChevroletChevelleSS—
1964–1971FordCustom 500Base—
1992–1995GMCK2500 SuburbanSLE—
1991–1993GMCK2500Sierra—
1968–1972GMCC25/C2500 SuburbanBase—
1967–1969FordRancheroBase—
1979–1980GMCC1500Heavy Half—
1968–1970American MotorsAMXBase—
1987–1988ChevroletR20 SuburbanScottsdale—
1967–1970American MotorsRebelSST—
1967ChevroletCamaroRS—
1975–1978GMCC25Base—
1964–1969FordFairlaneBase—
1988ChevroletR20Cheyenne—
1966–1967American MotorsAmbassador990—
1976FordF-350Base—
1967–1968American MotorsRebel770—
1963–1970MercuryMontereyBase—
1977ChevroletK30Custom Deluxe—
1977American MotorsHornetAMX—
1988–1995ChevroletC3500Cheyenne—
1969–1970American MotorsRebelBase—
1976GMCK15High Sierra—
1971–1978American MotorsMatadorBase—
1967ChevroletChevelleDeluxe—
1970American MotorsJavelinSST Trans Am—
1979–1980GMCC1500 SuburbanSierra Classic—
1988ChevroletR30Cheyenne—
1977–1978ChevroletK5 BlazerCustom Deluxe—
1976GMCK15Sierra Grande—
1975–1978GMCC15 SuburbanBase—
1970–1972ChevroletChevelleBase—
1987–1991GMCV3500Base—
1976–1978ChevroletK5 BlazerCheyenne—
1975–1980ChevroletC10Scottsdale—
1970–1972GMCK15/K1500 SuburbanBase—
1976FordF-100Base—
1969American MotorsRamblerHurst SC/Rambler—
1971–1974American MotorsAmbassadorBrougham—
1969FordTorinoSquire—
1967–1968American MotorsAmerican220—
1969–1970MercuryCougarCobra Jet—
1976–1978ChevroletK20Silverado—
1980JeepCJ7Golden Hawk—
1975–1978GMCC15Sierra Classic—
1981ChevroletC20 SuburbanDeluxe—
1980–1986ChevroletK30Scottsdale—
1976–1977GMCK25 SuburbanSierra Grande—
1981–1986ChevroletK30Custom—
1968–1974ChevroletC10 SuburbanBase—
1963MercuryMontereyCustom—
1991–1992ChevroletC2500Scottsdale—
1976–1977GMCK25 SuburbanBase—
1976GMCJimmySierra Classic—
1968–1971GMCK35/K3500 PickupBase—
1975–1976FordF-150Ranger—
1982ChevroletC20 SuburbanScottsdale—
1989–1991ChevroletR2500 SuburbanSilverado—
1969American MotorsRamblerRogue—
1979–1986GMCC3500Sierra Classic—
1973–1976JeepWagoneerCustom—
1974American MotorsMatadorX—
1985ChevroletK20 SuburbanScottsdale—
1973–1974ChevroletG20 VanSportvan—
1994–1996GMCC2500Sierra SL—
1975–1980ChevroletC10 SuburbanCustom Deluxe—
1965–1969MercuryCometBase—
1987–1988ChevroletR20Silverado—
1974–1977JeepCherokeeS—
1973–1974ChevroletMonte CarloLandau—
1966–1967MercuryVoyagerBase—
1972–1981JeepCJ5Base—
1979–1980GMCC1500Sierra Grande—
1975–1976FordF-150Northland—
1988–1993GMCK3500Sierra—
1972–1973JeepJ-4800Base—
1974GMCK15/K1500 SuburbanBase—
1976FordF-150Base—
1977–1979JeepCJ7Golden Eagle—
1989–1996GMCG3500Vandura—
1985ChevroletK20 SuburbanSilverado—
1973–1974ChevroletK20 PickupBase—
1975–1986ChevroletC30Scottsdale—
1991–1993GMCK2500Sierra SLX—
1973–1976ChevroletCapriceClassic—
1964–1968MercuryPark LaneBase—
1976–1978InternationalScout IITerra—
1968–1974GMCC15/C1500 SuburbanBase—
1979–1980ChevroletK10Cheyenne—
1988–1992ChevroletK3500Scottsdale—
1975–1976FordF-250Ranger XLT—
1978ChevroletK5 BlazerSilverado—
1963–1968FordThunderbirdBase—
1975–1980ChevroletC10 SuburbanScottsdale—
1976ChevroletK10Cheyenne—
1966–1972ChevroletCapriceBase—
1976ChevroletImpalaS—
1967MercuryBroughamBase—
1967–1972ChevroletCamaroSS—
1973–1974ChevroletG20 VanBase—
1994–1995GMCC3500Sierra SLT—
1976–1978ChevroletK20Scottsdale—
1987–1989GMCV3500Sierra Classic—
1980ChevroletK20Custom Deluxe—
1973ChevroletMonte CarloS—
1987–1988ChevroletV20 SuburbanScottsdale—
1972–1973International1210Base—
1976GMCJimmyHigh Sierra—
1975–1976ChevroletG30Hi-Cube—
1969–1972ChevroletChevelleGreenbrier—
1975–1976FordF-100Ranger XLT—
1977–1980JeepCJ5Golden Eagle—
1972InternationalM800 Post OfficeBase—
1968–1972American MotorsJavelinSST—
1969–1970MercuryMarauderX-100—
1973–1974ChevroletCapriceEstate—
1990ChevroletV2500 SuburbanScottsdale—
1966American MotorsClassic550—
1989–1990ChevroletV3500Scottsdale—
1995GMCC2500 SuburbanSLT—
1979–1982GMCC3500Sierra Grande—
1990–1991GMCV3500SLE—
1985ChevroletK20 SuburbanCustom—
1990GMCR2500 SuburbanSLE—
1987–1988ChevroletR30Scottsdale—
1984–1991JeepGrand WagoneerBase—
1975–1976FordF-350Ranger XLT—
1963–1970MercuryColony ParkBase—
1976GMCK15Base—
1968–1969FordTorinoBase—
1975InternationalTravelall200—
1973International1110Travelall—
1975–1978GMCC15High Sierra—
1972ChevroletBrookwoodBase—
1971American MotorsHornetSC/360—
1987GMCR2500 SuburbanHigh Sierra—
1970–1971FordLTDBrougham—
1979–1980GMCK1500Sierra Classic—
1973GMCJimmyBase—
1975–1976FordF-350Northland—
1972–1973International1110Base—
1969FordTorinoCobra—
1981ChevroletC20Deluxe—
1992–1994ChevroletC2500 SuburbanSilverado—
1977ChevroletK30Scottsdale—
1979–1983JeepWagoneerLimited—
1963–1970FordGalaxie 500XL—
1987–1988ChevroletR20Scottsdale—
1976–1981JeepCJ7Base—
1976–1978ChevroletK20Cheyenne—
1975–1978GMCC15Sierra Grande—
1974GMCC25/C2500 SuburbanBase—
1968–1969ChevroletK20 PickupBase—
1977ChevroletK30Silverado—
1970ChevroletTownsmanBase—
1988–1993GMCC3500Sierra SLX—
1974GMCK25/K2500 SuburbanBase—
1971–1977American MotorsHornetSportabout—
1963–1971FordRanch WagonBase—
1967–1972ChevroletCamaroBase—
1991–1996GMCC2500Sierra SLE—
1987–1988ChevroletR30Silverado—
1989–1996GMCG3500Vandura Special—
1987ChevroletR20 SuburbanCustom Deluxe—
1977–1978GMCC15Heavy Half—
1984–1985JeepGrand WagoneerLimited—
1966American MotorsClassic770—
1970FordRanch WagonPolice Cruiser—
1976GMCK15Sierra Classic—
1976–1978GMCK25Sierra Classic—
1987–1989GMCR2500Base—
1974International100Travelall—
1970–1971InternationalM800Base—
1963–1967FordGalaxieBase—
1975–1976FordF-350Ranger—
1966–1974ChevroletCorvetteBase—
1969–1970MercuryMontereyCustom—
1991–1995ChevroletC2500Cheyenne—
1994–1995GMCC3500Sierra SL—
1988–1996GMCG3500Magnavan—
1968–1969MercuryMontegoBase—
1987–1991GMCR3500Base—
1992–1995ChevroletC2500 SuburbanBase—
1978InternationalScout IISS2—
1988–1996ChevroletG30Hi-Cube—
1966–1967MercuryMontereyS-55—
1975–1977ChevroletC20 SuburbanSilverado—
1975–1980ChevroletC20 SuburbanCustom Deluxe—
1975–1986ChevroletC20Silverado—
1974FordM-450Base—
1969–1970ChevroletNovaBase—
1987–1988ChevroletR20 SuburbanSilverado—
1970FordMustangMach 1—
1975–1976FordF-250Custom—
1969ChevroletCamaroRS—
1965–1972ChevroletBiscayneBase—
1976ChevroletG20Chevy Van—
1968–1969FordRanchero500—
1963–1966MercuryMarauderBase—
1992–1994ChevroletK2500 SuburbanSilverado—
1989–1991ChevroletV3500Cheyenne—
1987–1988ChevroletR30Custom Deluxe—
1995ChevroletC2500 SuburbanLS—
1973ChevroletK20 SuburbanBase—
1976GMCJimmySierra Grande—
1968–1974American MotorsJavelinBase—
1991–1993GMCC2500Sierra SLX—
1970MercuryMarquisBrougham—
1975InternationalTravelall150—
1975–1981JeepCJ5Renegade—
1990–1993ChevroletC1500Silverado—
1981ChevroletC30Deluxe—
1966–1967American MotorsAmbassador880—
1990ChevroletV2500 SuburbanSilverado—
1983JeepCherokeePioneer—
1972–1982JeepWagoneerBase—
1970International1100DBase—
1976ChevroletK10Scottsdale—
1987–1989GMCV3500High Sierra—
1995ChevroletK2500 SuburbanLS—
1977GMCC15Indy Hauler—
1994–1996GMCC2500Sierra SLT—
1979–1980GMCK1500High Sierra—
1965–1969MercuryCycloneBase—
1975ChevroletMonte CarloS—
1987–1988ChevroletV30Custom Deluxe—
1968–1974ChevroletC10 PickupBase—
1976–1978GMCK25High Sierra—
1995ChevroletK2500 SuburbanLT—
1965–1967MercuryVillagerBase—
1991–1993GMCC2500Sierra—
1973–1974ChevroletG10 VanBase—
1969–1972ChevroletChevelleConcours Estate—
1968–1969ChevroletChevelle300 Deluxe—
1983JeepCherokeeWide Track Chief—
1979–1986GMCC2500 SuburbanSierra Classic—
1975–1980ChevroletC20Custom Deluxe—
1976–1978InternationalScout IIBase—
1975–1978GMCC25 SuburbanBase—
1963–1971FordGalaxie 500Base—
1973–1974GMCK35/K3500 PickupBase—
1970–1972ChevroletKingswoodEstate—
1969–1970FordMustangBoss 429—
1979–1980ChevroletK10Scottsdale—
1975–1978GMCC15 SuburbanSierra Grande—
1994–1995ChevroletK2500Base—
1963–1971FordCountry SedanBase—
1989–1996GMCG3500Rally—
1965–1967ChevroletImpalaSS—
1970American MotorsRebelThe Machine—
1988–1996ChevroletG30Sportvan—
1989–1991ChevroletV3500Silverado—
1975–1976ChevroletImpalaCustom—
1972ChevroletCamaroZ28—
1970–1972American MotorsHornetSST—
1969MercuryCycloneCJ—
1965–1975ChevroletBel AirBase—
1988–1995GMCK3500Sierra SLE—
1987–1989GMCR2500Sierra Classic—
1987–1989GMCR3500Sierra Classic—
1975–1978GMCC35Sierra Grande—
1973ChevroletChevelleDeluxe—
1968American MotorsAmericanRogue—
1969–1970MercuryMarauderBase—
1975–1976GMCG25Rally—
1966–1975ChevroletEl CaminoBase—
1994–1995GMCK2500Sierra SL—
1979–1980ChevroletK10Silverado—
Specifications
CategoryEngine Components
Sub-CategoryValve Locks
UPC036584150176
CARB ApprovedYes
Prop 65 WarningY
Special OrderYes
Weight0.12 lb
Dimensions (L×W×H)5 × 3 × 0.25 in