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Fel-Pro 421

O-Ring 1-1/8" inside diameter

Fel-Pro 421

375-421

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Fel-Pro 421 O-Ring 1-1/8" inside diameter $0.99
O-Ring
  • 1-1/8'' inside diameter
  • 1-3/8" outside diameter

  • Specifications:

    Set Description
    O-Ring
    Manufacturer's Part Number:
    421

    Fel-Pro gaskets are engineered to deliver a perfect seal on every engine, which is the reason nearly every NHRA Drag Racing and NASCAR Cup Series team, as well as the majority of professional engine rebuilders and auto techs, choose Fel-Pro.

    Does Fel-Pro 421 fit your vehicle?

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    Liter

    1982-1986 BUICK CENTURY

    • CC: 2474
    • Liter: 2.5
    • SubModel: CUSTOM
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1969-1970 INTERNATIONAL SCOUT

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 304
    • EngineType: V8 ( 5.0 L / 304 )

    1969-1970 INTERNATIONAL M800

    • CC: 2491
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 152
    • EngineType: L4 ( 2.5 L / 152 )

    1969-1972 INTERNATIONAL M1100

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 304
    • EngineType: V8 ( 5.0 L / 304 )

    1986 GMC S15 PICKUP

    • CC: 2474
    • Liter: 2.5
    • SubModel: GYPSY
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1984-1986 CHEVROLET CELEBRITY

    • CC: 2474
    • Liter: 2.5
    • SubModel: EUROSPORT
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1982-1986 PONTIAC 6000

    • CC: 2474
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1967 INTERNATIONAL 1200B

    • EngineType: V8 ( 5.0 L / 304 )
    • SubModel: BASE

    1982-1983 AMERICAN MOTORS EAGLE

    • Liter: 2.5
    • SubModel: LIMITED
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1983 AMERICAN MOTORS EAGLE

    • Liter: 2.5
    • SubModel: LIMITED
    • CUI: 150
    • EngineType: L4 ( 2.5 L / 150 )

    1959 BUICK LESABRE

    • CC: 6572
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 401
    • EngineType: V8 ( 6.6 L / 401 )

    1966 INTERNATIONAL 1100A

    • CC: 4983
    • Liter: 5.0
    • SubModel: TRAVELALL CUSTOM
    • CUI: 304
    • EngineType: V8 ( 5.0 L / 304 )

    1965-1967 INTERNATIONAL M1100

    • CC: 2491
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 152
    • EngineType: L4 ( 2.5 L / 152 )

    1974 INTERNATIONAL 100

    • EngineType: V8 ( 6.4 L / 392 )
    • SubModel: BASE

    1985-1986 CHEVROLET S10 PICKUP

    • CC: 2474
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1985 PONTIAC FIREBIRD

    • CC: 2474
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1968 INTERNATIONAL 1300C

    • EngineType: V8 ( 5.0 L / 304 )
    • SubModel: BASE

    1969-1970 INTERNATIONAL 1000D

    • EngineType: V8 ( 6.4 L / 392 )
    • SubModel: BASE

    1982 AMERICAN MOTORS SPIRIT

    • Liter: 2.5
    • SubModel: BASE
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1959-1960 INTERNATIONAL B122

    • CC: 4360
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 266
    • EngineType: V8 ( 4.3 L / 266 )

    1962 BUICK WILDCAT

    • CC: 6572
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 401
    • EngineType: V8 ( 6.6 L / 401 )

    1967-1968 INTERNATIONAL MA1200

    • CC: 4982
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 304
    • EngineType: V8 ( 5.0 L / 304 )

    1982-1983 AMERICAN MOTORS EAGLE

    • Liter: 2.5
    • SubModel: SX4
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1961-1962 INTERNATIONAL C100

    • EngineType: V8 ( 5.0 L / 304 )
    • SubModel: BASE

    1985-1986 GMC S15 JIMMY

    • CC: 2474
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1956 CHEVROLET TRUCK

    • CC: 5310
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 324
    • EngineType: V8 ( 5.3 L / 324 )

    1969-1970 INTERNATIONAL 1000D

    • EngineType: V8 ( 5.6 L / 345 )
    • SubModel: BASE

    1967 INTERNATIONAL M1400

    • CC: 4982
    • Liter: 5.0
    • SubModel: BASE
    • CUI: 304
    • EngineType: V8 ( 5.0 L / 304 )

    1966 BUICK GRAN SPORT

    • Liter: 6.6
    • SubModel: BASE
    • CUI: 401
    • EngineType: V8 ( 6.6 L / 401 )

    1958 BUICK LIMITED

    • EngineType: ALL
    • SubModel: ALL

    1984 BUICK CENTURY

    • CC: 2474
    • Liter: 2.5
    • SubModel: ESTATE
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1967 INTERNATIONAL 1100B

    • Liter: 4.4
    • SubModel: TRAVELALL CUSTOM
    • CUI: 266
    • EngineType: V8 ( 4.4 L / 266 )

    1965 INTERNATIONAL D1300

    • EngineType: V8 ( 4.3 L / 266 )
    • SubModel: BASE

    1985 GMC SAFARI

    • CC: 2474
    • Liter: 2.5
    • SubModel: SL
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1986 OLDSMOBILE CALAIS

    • CC: 2474
    • Liter: 2.5
    • SubModel: GT
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1968 INTERNATIONAL SCOUT

    • CC: 4360
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 266
    • EngineType: V8 ( 4.3 L / 266 )

    1984 PONTIAC FIERO

    • EngineType: ALL
    • SubModel: ALL

    1959-1960 INTERNATIONAL B112

    • CC: 4360
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 266
    • EngineType: V8 ( 4.3 L / 266 )

    1982-1984 OLDSMOBILE OMEGA

    • CC: 2474
    • Liter: 2.5
    • SubModel: ES
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1972-1974 INTERNATIONAL MS1210

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 304
    • EngineType: V8 ( 5.0 L / 304 )

    1961-1962 INTERNATIONAL C132

    • EngineType: V8 ( 4.3 L / 266 )
    • SubModel: BASE

    1968 INTERNATIONAL M1100

    • CC: 2491
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 152
    • EngineType: L4 ( 2.5 L / 152 )

    1985-1986 OLDSMOBILE CALAIS

    • CC: 2474
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1966 INTERNATIONAL 1200A

    • EngineType: V8 ( 4.3 L / 266 )
    • SubModel: BASE

    1967 INTERNATIONAL 1300B

    • EngineType: V8 ( 5.6 L / 345 )
    • SubModel: BASE

    1982 AMERICAN MOTORS CONCORD

    • Liter: 2.5
    • SubModel: DL
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1963-1964 INTERNATIONAL C1300

    • EngineType: V8 ( 5.0 L / 304 )
    • SubModel: BASE

    1985-1986 CHEVROLET S10 PICKUP

    • CC: 2474
    • Liter: 2.5
    • SubModel: DURANGO
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1976-1980 INTERNATIONAL SCOUT II

    • Liter: 5.0
    • SubModel: BASE
    • CUI: 304
    • EngineType: V8 ( 5.0 L / 304 )

    1985-1986 OLDSMOBILE CUTLASS CIERA

    • CC: 2474
    • Liter: 2.5
    • SubModel: HOLIDAY
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1956 GMC 300

    • CC: 5310
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 324
    • EngineType: V8 ( 5.3 L / 324 )

    1982-1983 AMERICAN MOTORS EAGLE

    • Liter: 2.5
    • SubModel: DL SX4
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1971 INTERNATIONAL 1010

    • EngineType: ALL
    • SubModel: ALL

    1986 PONTIAC FIREBIRD

    • CC: 2474
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1983 JEEP CJ7

    • Liter: 2.5
    • SubModel: LAREDO
    • CUI: 150
    • EngineType: L4 ( 2.5 L / 150 )

    1965-1967 INTERNATIONAL M1200

    • CC: 4360
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 266
    • EngineType: V8 ( 4.3 L / 266 )

    1958-1959 GMC 100 PICKUP

    • CC: 5272
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 322
    • EngineType: V8 ( 5.3 L / 322 )

    1971 INTERNATIONAL 1110

    • EngineType: V8 ( 5.0 L / 304 )
    • SubModel: BASE

    1959-1960 INTERNATIONAL B132

    • CC: 4360
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 266
    • EngineType: V8 ( 4.3 L / 266 )

    1967 INTERNATIONAL MA1200

    • CC: 4360
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 266
    • EngineType: V8 ( 4.3 L / 266 )

    1961-1962 INTERNATIONAL C112

    • EngineType: V8 ( 5.0 L / 304 )
    • SubModel: BASE

    1969-1970 INTERNATIONAL 1200D

    • Liter: 4.4
    • SubModel: TRAVELALL CUSTOM
    • CUI: 266
    • EngineType: V8 ( 4.4 L / 266 )

    1985-1986 GMC S15 JIMMY

    • CC: 2474
    • Liter: 2.5
    • SubModel: SIERRA CLASSIC
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1982-1986 PONTIAC 6000

    • CC: 2474
    • Liter: 2.5
    • SubModel: LE
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1969-1970 INTERNATIONAL 1100D

    • EngineType: V8 ( 5.6 L / 345 )
    • SubModel: BASE

    1969-1970 INTERNATIONAL MA1200

    • CC: 4360
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 266
    • EngineType: V8 ( 4.3 L / 266 )

    1982-1983 JEEP CJ5

    • Liter: 2.5
    • SubModel: LIMITED
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1964 BUICK ESTATE WAGON

    • CC: 6966
    • Liter: 7.0
    • SubModel: BASE
    • CUI: 425
    • EngineType: V8 ( 7.0 L / 425 )

    1972-1974 INTERNATIONAL MS1210

    • CC: 5654
    • Liter: 5.6
    • SubModel: BASE
    • CUI: 345
    • EngineType: V8 ( 5.6 L / 345 )

    1963-1966 BUICK WILDCAT

    • EngineType: ALL
    • SubModel: ALL

    1973 INTERNATIONAL 1210

    • CC: 6425
    • Liter: 6.4
    • SubModel: TRAVELALL
    • CUI: 392
    • EngineType: V8 ( 6.4 L / 392 )

    1983-1984 PONTIAC FIREBIRD

    • CC: 2474
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1959-1963 BUICK INVICTA

    • EngineType: ALL
    • SubModel: ALL

    1968 INTERNATIONAL 1100C

    • EngineType: V8 ( 5.6 L / 345 )
    • SubModel: BASE

    1961-1962 INTERNATIONAL C120

    • EngineType: V8 ( 5.0 L / 304 )
    • SubModel: BASE

    1965-1967 INTERNATIONAL M800

    • CC: 2491
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 152
    • EngineType: L4 ( 2.5 L / 152 )

    1965-1966 BUICK SKYLARK

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

    1969-1970 INTERNATIONAL M1100

    • CC: 2491
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 152
    • EngineType: L4 ( 2.5 L / 152 )

    1980 INTERNATIONAL SCOUT II

    • Liter: 5.6
    • SubModel: BASE
    • CUI: 345
    • EngineType: V8 ( 5.6 L / 345 )

    1966 INTERNATIONAL 1200A

    • CC: 4983
    • Liter: 5.0
    • SubModel: TRAVELALL CUSTOM
    • CUI: 304
    • EngineType: V8 ( 5.0 L / 304 )

    1985-1986 CHEVROLET S10 BLAZER

    • CC: 2474
    • Liter: 2.5
    • SubModel: SPORT
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1962-1963 BUICK ESTATE WAGON

    • CC: 6572
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 401
    • EngineType: V8 ( 6.6 L / 401 )

    1956-1959 GMC 300

    • CC: 5272
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 322
    • EngineType: V8 ( 5.3 L / 322 )

    1966 INTERNATIONAL 1000A

    • EngineType: V8 ( 4.3 L / 266 )
    • SubModel: BASE

    1985 BUICK SOMERSET REGAL

    • CC: 2474
    • Liter: 2.5
    • SubModel: LIMITED
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1961-1962 INTERNATIONAL C110

    • EngineType: V8 ( 5.0 L / 304 )
    • SubModel: BASE

    1983 AMERICAN MOTORS EAGLE

    • Liter: 2.5
    • SubModel: DL SX4
    • CUI: 150
    • EngineType: L4 ( 2.5 L / 150 )

    1975 INTERNATIONAL 200 PICKUP

    • Liter: 6.4
    • SubModel: BASE
    • CUI: 392
    • EngineType: V8 ( 6.4 L / 392 )

    1968 INTERNATIONAL SCOUT

    • Liter: 4.4
    • SubModel: BASE
    • CUI: 266
    • EngineType: V8 ( 4.4 L / 266 )

    1982-1983 JEEP SCRAMBLER

    • Liter: 2.5
    • SubModel: BASE
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1959-1960 INTERNATIONAL B130

    • CC: 4360
    • Liter: 4.3
    • SubModel: BASE
    • CUI: 266
    • EngineType: V8 ( 4.3 L / 266 )

    1982-1983 PONTIAC PHOENIX

    • CC: 2474
    • Liter: 2.5
    • SubModel: LJ
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1982 PONTIAC FIREBIRD

    • CC: 2474
    • Liter: 2.5
    • SubModel: S/E
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1956 GMC 370

    • CC: 5310
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 324
    • EngineType: V8 ( 5.3 L / 324 )

    1986 OLDSMOBILE CUTLASS CIERA

    • CC: 2474
    • Liter: 2.5
    • SubModel: SL
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1982-1984 PONTIAC PHOENIX

    • CC: 2474
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1956 GMC 150 PICKUP

    • CC: 5310
    • Liter: 5.3
    • SubModel: BASE
    • CUI: 324
    • EngineType: V8 ( 5.3 L / 324 )

    1972-1974 INTERNATIONAL MS1210

    • CC: 6424
    • Liter: 6.4
    • SubModel: BASE
    • CUI: 392
    • EngineType: V8 ( 6.4 L / 392 )

    1985-1986 CHEVROLET S10 BLAZER

    • CC: 2474
    • Liter: 2.5
    • SubModel: BASE
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1971 INTERNATIONAL M800 POST OFFICE

    • Liter: 2.5
    • SubModel: BASE
    • CUI: 152
    • EngineType: L4 ( 2.5 L / 152 )

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