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Fel-Pro 421

O-Ring 1-1/8" inside diameter

Fel-Pro 421

375-421

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Ships directly from the manufacturer
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Fel-Pro 421 O-Ring 1-1/8" inside diameter $1.99
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

    1965-1970 INTERNATIONAL M1100

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

    1986 PONTIAC FIERO

    • EngineType: ALL
    • SubModel: SPORT

    1985-1986 CHEVROLET S10 PICKUP

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

    1968 INTERNATIONAL 1200C

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

    1969-1971 INTERNATIONAL M800

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

    1961 BUICK ESTATE WAGON

    • CC: 5967
    • Liter: 6.0
    • SubModel: BASE
    • CUI: 364
    • EngineType: V8 ( 6.0 L / 364 )

    1972-1974 INTERNATIONAL MS1210

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

    1959-1960 INTERNATIONAL B112

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

    1956 GMC 350-8

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

    1972-1973 INTERNATIONAL 1010

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

    1966 INTERNATIONAL 1100A

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

    1982 CHEVROLET CELEBRITY

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

    1972-1974 INTERNATIONAL MS1210

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

    1973 INTERNATIONAL 1210

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

    1984 PONTIAC PHOENIX

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

    1958-1959 GMC 100 PICKUP

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

    1969-1970 INTERNATIONAL M800 POST OFFICE

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

    1969-1970 INTERNATIONAL M1100

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

    1969 INTERNATIONAL M1400

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

    1974 INTERNATIONAL 100

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

    1966 INTERNATIONAL 1200A

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

    1985-1986 PONTIAC FIERO

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

    1976-1980 INTERNATIONAL SCOUT II

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

    1964 BUICK LESABRE

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

    1986 OLDSMOBILE CUTLASS CIERA

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

    1967 INTERNATIONAL 908B

    • EngineType: ALL
    • SubModel: ALL

    1969-1970 INTERNATIONAL M800 POST OFFICE

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

    1985 BUICK SOMERSET REGAL

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

    1961-1962 INTERNATIONAL C102

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

    1959-1960 INTERNATIONAL B100

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

    1966 BUICK RIVIERA

    • EngineType: ALL
    • SubModel: GRAN SPORT

    1974 INTERNATIONAL 200

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

    1985-1986 CHEVROLET CELEBRITY

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

    1985-1986 CHEVROLET ASTRO

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

    1985-1986 GMC S15 JIMMY

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

    1969-1970 INTERNATIONAL 1000D

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

    1969-1970 INTERNATIONAL 1200D

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

    1956 CHEVROLET TRUCK

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

    1969-1970 INTERNATIONAL 1000D

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

    1967-1968 INTERNATIONAL MA1200

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

    1973-1974 INTERNATIONAL MS1210

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

    1962-1963 BUICK ESTATE WAGON

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

    1985 CHEVROLET ASTRO

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

    1961-1962 INTERNATIONAL C110

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

    1985 CHEVROLET ASTRO

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

    1962-1965 INTERNATIONAL CM75

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

    1985 OLDSMOBILE CALAIS

    • CC: 2474
    • Liter: 2.5
    • SubModel: 500
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1954 BUICK SKYLARK

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

    1984 PONTIAC FIERO

    • EngineType: ALL
    • SubModel: ALL

    1971 INTERNATIONAL M800 POST OFFICE

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

    1986 PONTIAC FIERO

    • EngineType: ALL
    • SubModel: VALUE LEADER

    1982-1986 OLDSMOBILE CUTLASS CIERA

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

    1985-1986 OLDSMOBILE CUTLASS CIERA

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

    1966 BUICK SKYLARK

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

    1984-1985 CHEVROLET CITATION II

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

    1965-1967 INTERNATIONAL M800

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

    1982-1983 JEEP DJ5

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

    1985 PONTIAC FIERO

    • CC: 2474
    • Liter: 2.5
    • SubModel: SPORT
    • 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 )

    1956-1959 GMC 300

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

    1963 INTERNATIONAL C1200

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

    1983 JEEP CJ7

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

    1982 AMERICAN MOTORS CONCORD

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

    1971 INTERNATIONAL SCOUT

    • EngineType: ALL
    • SubModel: ALL

    1961 BUICK ESTATE WAGON

    • CC: 5967
    • Liter: 6.0
    • SubModel: BASE
    • CUI: 364
    • EngineType: V8 ( 6.0 L / 364 )

    1982 AMERICAN MOTORS CONCORD

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

    1986 PONTIAC FIREBIRD

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

    1956-1957 GMC 100

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

    1968 INTERNATIONAL 1200C

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

    1983 AMERICAN MOTORS EAGLE

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

    1968 INTERNATIONAL MA1200

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

    1982-1986 BUICK SKYLARK

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

    1967 INTERNATIONAL SCOUT

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

    1982-1983 JEEP SCRAMBLER

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

    1984-1985 CHEVROLET CITATION II

    • CC: 2474
    • Liter: 2.5
    • SubModel: X-11
    • CUI: 151
    • EngineType: L4 ( 2.5 L / 151 )

    1983 PONTIAC FIREBIRD

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

    1984 BUICK CENTURY

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

    1973 INTERNATIONAL 1210

    • Liter: 5.7
    • SubModel: TRAVELALL
    • CUI: 345
    • EngineType: V8 ( 5.7 L / 345 )

    1969-1972 INTERNATIONAL M1200

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

    1982-1983 JEEP SCRAMBLER

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

    1978-1979 INTERNATIONAL SCOUT II

    • Liter: 5.0
    • SubModel: SS2
    • CUI: 304
    • EngineType: V8 ( 5.0 L / 304 )

    1985-1986 GMC S15 PICKUP

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

    1983 OLDSMOBILE CUTLASS CIERA

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

    1965 INTERNATIONAL D1100

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

    1969 INTERNATIONAL M800 NAVY

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

    1968 INTERNATIONAL M800

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

    1982 PONTIAC FIREBIRD

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

    1982-1983 JEEP CJ7

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

    1969-1970 INTERNATIONAL M1200

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

    1956 GMC 300

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

    1982-1986 BUICK CENTURY

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

    1985-1986 GMC S15 JIMMY

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

    1962-1965 INTERNATIONAL CM80

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

    1964 BUICK LESABRE

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

    1985-1986 GMC S15 PICKUP

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

    1985 GMC SAFARI

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

    1965-1968 INTERNATIONAL M1100

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

    1968 INTERNATIONAL M1200

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

    1982-1983 JEEP CJ7

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

    1967 INTERNATIONAL 1100B

    • EngineType: V8 ( 5.6 L / 345 )
    • SubModel: BASE
    Some parts are not legal for use in California or other states with similar laws / regulations