# COMP Cams Valve Locks 3/8in Four Groove lock angle and 3/8" valve stem size are a perfect replacement lock for stock engine rebuilds. They are 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. This Part Fits: Year Make Model Submodel 1980 Chrysler Cordoba 300 1980-1983 Chrysler Cordoba Base 1980 Chrysler Cordoba Crown 1980-1982 Chrysler Cordoba LS 1983 Chrysler Fifth Avenue Base 1978-1981 Chrysler LeBaron Base 1978-1981 Chrysler LeBaron Medallion 1978 Chrysler LeBaron S 1979-1981 Chrysler LeBaron Salon 1980-1981 Chrysler LeBaron Special 1982 Chrysler New Yorker Base 1979-1981 Chrysler Newport Base 1978-1981 Chrysler Town & Country Base 1964-1970 Dodge A100 Truck Base 1968-1970 Dodge A100 Truck Sportsman 1967-1970 Dodge A108 Van Base 1976-1980 Dodge Aspen Base 1976-1977 Dodge Aspen Custom 1976-1977 Dodge Aspen Special Edition 1975-1980 Dodge B100 Base 1971-1974 Dodge B100 Van Base 1971-1974 Dodge B100 Van Sportsman 1981-1987 Dodge B150 Base 1975-1980 Dodge B200 Base 1971-1974 Dodge B200 Van Base 1972-1974 Dodge B200 Van Maxi 1972-1974 Dodge B200 Van Maxi Wagon 1971-1974 Dodge B200 Van Sportsman 1981-1987 Dodge B250 Base 1975-1980 Dodge B300 Base 1971-1974 Dodge B300 Van Base 1972-1974 Dodge B300 Van Maxi 1972-1974 Dodge B300 Van Maxi Wagon 1971-1974 Dodge B300 Van Sportsman 1974-1975,1977-1979 Dodge CB300 Base 1970-1972 Dodge Challenger Base 1969-1970 Dodge Charger 500 1968-1974,1976 Dodge Charger Base 1971-1974 Dodge Charger Special Edition 1976 Dodge Charger Sport 1965-1970 Dodge Coronet 440 1966-1970 Dodge Coronet 500 1970-1976 Dodge Coronet Base 1971,1976 Dodge Coronet Brougham 1971-1974 Dodge Coronet Crestwood 1971-1975 Dodge Coronet Custom 1966-1970 Dodge Coronet Deluxe 1975-1979,1986-1987 Dodge D100 Custom 1976-1978 Dodge D100 Warlock 1979 Dodge D100 Warlock II 1968-1974 Dodge D100 Pickup Base 1960-1967 Dodge D100 Series Base 1977-1987 Dodge D150 Base 1982-1983 Dodge D150 Miser 1977-1980 Dodge D200 Base 1975-1976 Dodge D200 Custom 1968-1974 Dodge D200 Pickup Base 1960-1967 Dodge D200 Series Base 1981-1987 Dodge D250 Base 1977-1978 Dodge D300 Base 1975-1976 Dodge D300 Custom 1968-1974 Dodge D300 Pickup Base 1960-1967 Dodge D300 Series Base 1963-1968 Dodge Dart 270 1962 Dodge Dart 330 1962 Dodge Dart 440 1960-1976 Dodge Dart Base 1969-1975 Dodge Dart Custom 1971-1972 Dodge Dart Demon 1963,1965-1969 Dodge Dart GT 1960-1961 Dodge Dart Phoenix 1960-1961 Dodge Dart Pioneer 1971-1974 Dodge Dart Special 1974-1975 Dodge Dart Special Edition 1973-1976 Dodge Dart Sport 1969-1976 Dodge Dart Swinger 1975-1976 Dodge Dart Swinger Special 1978-1981 Dodge Diplomat Base 1978-1983 Dodge Diplomat Medallion 1978 Dodge Diplomat S 1979-1983 Dodge Diplomat Salon 1981 Dodge Diplomat Sport 1961-1962 Dodge Lancer 170 1961-1962 Dodge Lancer 770 1980-1983 Dodge Mirada Special Coupe 1977-1978 Dodge Monaco Base 1977-1978 Dodge Monaco Brougham 1963-1964,1970-1971 Dodge Polara Base 1971 Dodge Polara Brougham 1970-1971 Dodge Polara Custom 1970 Dodge Polara Special 1974-1980 Dodge Ramcharger Base 1975-1980 Dodge Ramcharger SE 1979-1981 Dodge St. Regis Base 1975-1977,1986-1987 Dodge W100 Custom 1968-1974 Dodge W100 Pickup Base 1960-1967 Dodge W100 Series Base 1978-1987 Dodge W150 Base 1975-1980 Dodge W200 Base 1968,1970-1974 Dodge W200 Pickup Base 1960-1967 Dodge W200 Series Base 1977-1978 Dodge W300 Base 1975-1976 Dodge W300 Custom 1968-1974 Dodge W300 Pickup Base 1963-1967 Dodge W300 Series Base 1964-1972 Plymouth Barracuda Base 1970-1971 Plymouth Barracuda Gran Coupe 1960-1970 Plymouth Belvedere Base 1968-1970 Plymouth Belvedere Satellite 1965-1967 Plymouth Belvedere II Base 1960-1961 Plymouth Custom Base 1970-1975 Plymouth Duster Base 1975 Plymouth Duster Custom 1976 Plymouth Duster Sport 1960-1963 Plymouth Fleet Special Base 1960-1961,1966,1975-1978 Plymouth Fury Base 1971,1975 Plymouth Fury Custom 1968,1970 Plymouth Fury Custom Suburban 1976-1978 Plymouth Fury Salon 1969,1976-1978 Plymouth Fury Sport 1968,1970 Plymouth Fury Suburban 1968-1973 Plymouth Fury I Base 1965-1971 Plymouth Fury II Base 1965-1971 Plymouth Fury III Base 1980-1983 Plymouth Gran Fury Base 1980 Plymouth Gran Fury Salon 1975-1980 Plymouth PB100 Voyager 1974 Plymouth PB100 Van Voyager 1981-1983 Plymouth PB150 Voyager 1975-1978,1980 Plymouth PB200 Voyager 1974 Plymouth PB200 Van Voyager 1974 Plymouth PB200 Van Voyager EX Wagon 1981-1983 Plymouth PB250 Voyager 1966-1967,1970-1974 Plymouth Satellite Base 1971 Plymouth Satellite Brougham 1971-1974 Plymouth Satellite Custom 1971-1974 Plymouth Satellite Regent 1971-1974 Plymouth Satellite Sebring 1971-1974 Plymouth Satellite Sebring Plus 1970 Plymouth Satellite Sport 1960-1964 Plymouth Savoy Base 1960-1961 Plymouth Savoy Deluxe 1971-1976 Plymouth Scamp Base 1975 Plymouth Scamp Brougham 1975-1976 Plymouth Scamp Special 1960-1961 Plymouth Sport Wagon Base 1960-1961 Plymouth Suburban Base 1960-1961 Plymouth Suburban Custom 1961 Plymouth Suburban Deluxe 1975-1980 Plymouth Trailduster Base 1968-1969 Plymouth Valiant 100 1961-1964,1966 Plymouth Valiant 200 1961,1965-1967,1970-1976 Plymouth Valiant Base 1974-1975 Plymouth Valiant Brougham 1975 Plymouth Valiant Custom 1975 Plymouth Valiant Scamp 1965-1969 Plymouth Valiant Signet 1976-1980 Plymouth Volare Base 1976-1977 Plymouth Volare Custom 1976-1977 Plymouth Volare Premier 1976 Plymouth Volare Road Runner ## Details - **Price:** 79.98 CAD - **Vendor:** COMP Cams - **Type:** Valve Locks - **Tags:** ClearanceItem:N, Core:N, CorePrice:0, Engine Components>Valve Locks, EPA:N/A, fits_1960-1961`Plymouth`Suburban`Custom~1961`Plymouth`Suburban`Deluxe~1975-1980`Plymouth`Trailduster`Base~1968-1969`Plymouth`Valiant`100~1961-1964`Plymouth`Valiant`200~1966`Plymouth`Valiant`200~1961`Plymouth`Valiant`Base~1965-1967`Plymouth`Valiant`Base, fits_1960-1964`Plymouth`Savoy`Base~1960-1961`Plymouth`Savoy`Deluxe~1971-1976`Plymouth`Scamp`Base~1975`Plymouth`Scamp`Brougham~1975-1976`Plymouth`Scamp`Special~1960-1961`Plymouth`Sport Wagon`Base~1960-1961`Plymouth`Suburban`Base, fits_1960-1967`Dodge`D100 Series`Base~1977-1987`Dodge`D150`Base~1982-1983`Dodge`D150`Miser~1977-1980`Dodge`D200`Base~1975-1976`Dodge`D200`Custom~1968-1974`Dodge`D200 Pickup`Base~1960-1967`Dodge`D200 Series`Base~1981-1987`Dodge`D250`Base, fits_1961-1962`Dodge`Lancer`770~1980-1983`Dodge`Mirada`Special Coupe~1977-1978`Dodge`Monaco`Base~1977-1978`Dodge`Monaco`Brougham~1963-1964`Dodge`Polara`Base~1970-1971`Dodge`Polara`Base~1971`Dodge`Polara`Brougham~1970-1971`Dodge`Polara`Custom, fits_1963-1967`Dodge`W300 Series`Base~1964-1972`Plymouth`Barracuda`Base~1970-1971`Plymouth`Barracuda`Gran Coupe~1960-1970`Plymouth`Belvedere`Base~1968-1970`Plymouth`Belvedere`Satellite~1965-1967`Plymouth`Belvedere II`Base~1960-1961`Plymouth`Custom`Base, fits_1967-1970`Dodge`A108 Van`Base~1976-1980`Dodge`Aspen`Base~1976-1977`Dodge`Aspen`Custom~1976-1977`Dodge`Aspen`Special Edition~1975-1980`Dodge`B100`Base~1971-1974`Dodge`B100 Van`Base~1971-1974`Dodge`B100 Van`Sportsman~1981-1987`Dodge`B150`Base, fits_1968-1973`Plymouth`Fury I`Base~1965-1971`Plymouth`Fury II`Base~1965-1971`Plymouth`Fury III`Base~1980-1983`Plymouth`Gran Fury`Base~1980`Plymouth`Gran Fury`Salon~1975-1980`Plymouth`PB100`Voyager~1974`Plymouth`PB100 Van`Voyager, fits_1969-1976`Dodge`Dart`Swinger~1975-1976`Dodge`Dart`Swinger Special~1978-1981`Dodge`Diplomat`Base~1978-1983`Dodge`Diplomat`Medallion~1978`Dodge`Diplomat`S~1979-1983`Dodge`Diplomat`Salon~1981`Dodge`Diplomat`Sport~1961-1962`Dodge`Lancer`170, fits_1970-1974`Plymouth`Satellite`Base~1971`Plymouth`Satellite`Brougham~1971-1974`Plymouth`Satellite`Custom~1971-1974`Plymouth`Satellite`Regent~1971-1974`Plymouth`Satellite`Sebring~1971-1974`Plymouth`Satellite`Sebring Plus~1970`Plymouth`Satellite`Sport, fits_1970-1975`Plymouth`Duster`Base~1975`Plymouth`Duster`Custom~1976`Plymouth`Duster`Sport~1960-1963`Plymouth`Fleet Special`Base~1960-1961`Plymouth`Fury`Base~1966`Plymouth`Fury`Base~1975-1978`Plymouth`Fury`Base~1971`Plymouth`Fury`Custom, fits_1970-1976`Plymouth`Valiant`Base~1974-1975`Plymouth`Valiant`Brougham~1975`Plymouth`Valiant`Custom~1975`Plymouth`Valiant`Scamp~1965-1969`Plymouth`Valiant`Signet~1976-1980`Plymouth`Volare`Base~1976-1977`Plymouth`Volare`Custom, fits_1970`Dodge`Polara`Special~1974-1980`Dodge`Ramcharger`Base~1975-1980`Dodge`Ramcharger`SE~1979-1981`Dodge`St. Regis`Base~1975-1977`Dodge`W100`Custom~1986-1987`Dodge`W100`Custom~1968-1974`Dodge`W100 Pickup`Base~1960-1967`Dodge`W100 Series`Base, fits_1971-1972`Dodge`Dart`Demon~1963`Dodge`Dart`GT~1965-1969`Dodge`Dart`GT~1960-1961`Dodge`Dart`Phoenix~1960-1961`Dodge`Dart`Pioneer~1971-1974`Dodge`Dart`Special~1974-1975`Dodge`Dart`Special Edition~1973-1976`Dodge`Dart`Sport, fits_1971-1974`Dodge`Coronet`Crestwood~1971-1975`Dodge`Coronet`Custom~1966-1970`Dodge`Coronet`Deluxe~1975-1979`Dodge`D100`Custom~1986-1987`Dodge`D100`Custom~1976-1978`Dodge`D100`Warlock~1979`Dodge`D100`Warlock II~1968-1974`Dodge`D100 Pickup`Base, fits_1972-1974`Dodge`B300 Van`Maxi~1972-1974`Dodge`B300 Van`Maxi Wagon~1971-1974`Dodge`B300 Van`Sportsman~1974-1975`Dodge`CB300`Base~1977-1979`Dodge`CB300`Base~1970-1972`Dodge`Challenger`Base~1969-1970`Dodge`Charger`500~1968-1974`Dodge`Charger`Base, fits_1975-1980`Dodge`B200`Base~1971-1974`Dodge`B200 Van`Base~1972-1974`Dodge`B200 Van`Maxi~1972-1974`Dodge`B200 Van`Maxi Wagon~1971-1974`Dodge`B200 Van`Sportsman~1981-1987`Dodge`B250`Base~1975-1980`Dodge`B300`Base~1971-1974`Dodge`B300 Van`Base, fits_1975`Plymouth`Fury`Custom~1968`Plymouth`Fury`Custom Suburban~1970`Plymouth`Fury`Custom Suburban~1976-1978`Plymouth`Fury`Salon~1969`Plymouth`Fury`Sport~1976-1978`Plymouth`Fury`Sport~1968`Plymouth`Fury`Suburban~1970`Plymouth`Fury`Suburban, fits_1976-1977`Plymouth`Volare`Premier~1976`Plymouth`Volare`Road Runner, fits_1976`Dodge`Charger`Base~1971-1974`Dodge`Charger`Special Edition~1976`Dodge`Charger`Sport~1965-1970`Dodge`Coronet`440~1966-1970`Dodge`Coronet`500~1970-1976`Dodge`Coronet`Base~1971`Dodge`Coronet`Brougham~1976`Dodge`Coronet`Brougham, fits_1977-1978`Dodge`D300`Base~1975-1976`Dodge`D300`Custom~1968-1974`Dodge`D300 Pickup`Base~1960-1967`Dodge`D300 Series`Base~1963-1968`Dodge`Dart`270~1962`Dodge`Dart`330~1962`Dodge`Dart`440~1960-1976`Dodge`Dart`Base~1969-1975`Dodge`Dart`Custom, fits_1978-1987`Dodge`W150`Base~1975-1980`Dodge`W200`Base~1968`Dodge`W200 Pickup`Base~1970-1974`Dodge`W200 Pickup`Base~1960-1967`Dodge`W200 Series`Base~1977-1978`Dodge`W300`Base~1975-1976`Dodge`W300`Custom~1968-1974`Dodge`W300 Pickup`Base, fits_1979-1981`Chrysler`LeBaron`Salon~1980-1981`Chrysler`LeBaron`Special~1982`Chrysler`New Yorker`Base~1979-1981`Chrysler`Newport`Base~1978-1981`Chrysler`Town & Country`Base~1964-1970`Dodge`A100 Truck`Base~1968-1970`Dodge`A100 Truck`Sportsman, fits_1980`Chrysler`Cordoba`300~1980-1983`Chrysler`Cordoba`Base~1980`Chrysler`Cordoba`Crown~1980-1982`Chrysler`Cordoba`LS~1983`Chrysler`Fifth Avenue`Base~1978-1981`Chrysler`LeBaron`Base~1978-1981`Chrysler`LeBaron`Medallion~1978`Chrysler`LeBaron`S, fits_1981-1983`Plymouth`PB150`Voyager~1975-1978`Plymouth`PB200`Voyager~1980`Plymouth`PB200`Voyager~1974`Plymouth`PB200 Van`Voyager~1974`Plymouth`PB200 Van`Voyager EX Wagon~1981-1983`Plymouth`PB250`Voyager~1966-1967`Plymouth`Satellite`Base, LTL:N, MPN:604-12, Non-CARB:N, Prop65:Y, SpecialOrder:Y, TURN14_ID:4393019 ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 79.98 CAD | In stock | ## Images - Photo - Primary - Photo - Primary - Photo - Primary - Logo Image - Logo Image --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/comp-cams-valve-locks-3-8in-four-groove) > Updated: 2026-07-16