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Mr Gasket 121

Intake Manifold Gaskets Performance Material



Mr Gasket 121

Part Number: 720-121

Intake Manifold Gaskets
  • Performance Material
  • 1965-90 Chevy 396-454 Gen IV.
  • Thickness: .060''
  • Rectangular Raised Port: 1.85'' X 2.55''
  • $15.27
    Made In USA
    Mr Gasket 121 Intake Manifold Gaskets Performance Material $15.27

    Mr Gasket 121 Details

    Chevrolet - Big Block


  • Intake Gasket Set

  • Specifications:

    Engine Make/Size
    Chevy Big Block (396-454)
    Position
    N/A
    Thickness (in.)
    .06
    Port Height (in.)
    2.5
    Port Style
    Rectangular raised port
    Port Width (in.)
    1.75
    Quantity
    Sold as a set
    Water Crossover Style
    Open
    Gasket Material
    Composition
    Manufacturer's Part Number:
    121

    Get the right gasket for your project. These top-of-the-line Mr. Gasket Intake Manifold Gaskets are recommended for OE replacement, high-performance street, drag race and oval track applications. Sold 2/pkg.

    Performance Material
  • Manufactured from cellulose/nitrate composition gasket material
  • Provides excellent sealing and durability
  • Can be trimmed if necessary for modified ports
  • Complete with manifold end rail seals and distributor gasket

    Ultra-Seal Material
  • Manufactured from cellulose/nitrate composition gasket material
  • Provides excellent sealing and durability
  • Silicone beading applied around each port to create a tight leakproof seal
  • Cam be trimmed for modified ports
  • Complete with manifold end rail seals and distributor gasket

    Ultra-Seal III Material
  • Made from high-density, high-tensile strength, and high-temperature gasket material
  • Delivers excellent sealing properties for oil, fuel and coolant
  • Seals using low flange pressure (clamp force)
  • Can be modified (trimmed) easily to fit custom applications
  • Requires no gasket sealer for installation
  • Releases easily (no scrapping required) will not stick to mating surfaces when disassembling engine

  • Does Mr Gasket 121 fit your vehicle?

    Narrow Results

    1973-1974 CHEVROLET C20 PICKUP

    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454
    • EngineType: V8

    1981-1986 CHEVROLET C30 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: CUSTOM

    1970-1971 CHEVROLET CAMARO

    • Liter: 6.6
    • EngineType: V8
    • SubModel: BASE

    1979-1986 GMC C2500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: HIGH SIERRA

    1979-1980 CHEVROLET C10 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: CUSTOM DELUXE

    1976 GMC G35/G3500 VAN

    • Liter: 7.4
    • EngineType: V8
    • SubModel: BASE

    1987-1989 GMC R2500 SUBURBAN

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SIERRA CLASSIC

    1973 CHEVROLET CAPRICE

    • CC: 7439
    • Liter: 7.4
    • Aspiration: N
    • SubModel: ESTATE
    • Engine Vin: X
    • CUI: 454
    • EngineType: V8

    1968-1969 GMC K1500 PICKUP

    • Liter: 6.5
    • EngineType: V8
    • SubModel: BASE

    1979-1981 CHEVROLET C10 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SCOTTSDALE

    1972 CHEVROLET CHEVELLE

    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8

    1968 GMC K25/K2500 SUBURBAN

    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8

    1975-1976 CHEVROLET CAPRICE

    • Liter: 7.4
    • SubModel: CLASSIC
    • CUI: 454
    • EngineType: V8

    1990 GMC R2500 SUBURBAN

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SLE

    1971 CHEVROLET CHEVELLE

    • Liter: 7.4
    • EngineType: V8
    • SubModel: BASE

    1973-1974 CHEVROLET CORVETTE

    • CC: 7439
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Z
    • CUI: 454
    • EngineType: V8

    1973 GMC JIMMY

    • Liter: 7.4
    • EngineType: V8
    • SubModel: BASE

    1976 GMC K1500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: BASE

    1990 CHEVROLET C1500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SILVERADO

    1969 CHEVROLET CHEVELLE

    • Liter: 6.5
    • EngineType: V8
    • SubModel: GREENBRIER

    1974 CHEVROLET CAPRICE

    • Liter: 7.4
    • SubModel: CLASSIC
    • CUI: 454
    • EngineType: V8

    1972 CHEVROLET CHEVELLE

    • CC: 6588
    • Liter: 6.6
    • Aspiration: N
    • SubModel: CONCOURS
    • Engine Vin: U
    • CUI: 402
    • EngineType: V8

    1979-1986 GMC K3500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: HIGH SIERRA

    1969 CHEVROLET CHEVELLE

    • Liter: 6.5
    • EngineType: V8
    • SubModel: CONCOURS ESTATE

    1990 GMC V3500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SLE

    1970-1971 CHEVROLET CHEVELLE

    • Liter: 7.4
    • EngineType: V8
    • SubModel: MALIBU

    1988-1990 GMC G35/G3500 VAN

    • Liter: 7.4
    • EngineType: V8
    • SubModel: MAGNAVAN

    1988-1990 GMC C3500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SIERRA

    1968 CHEVROLET K20 PICKUP

    • CC: 6489
    • Liter: 6.5
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: E
    • CUI: 396
    • EngineType: V8

    1963 CHEVROLET IMPALA

    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8

    1968 GMC K35/K3500 PICKUP

    • CC: 6489
    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8

    1987-1989 GMC R2500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: HIGH SIERRA

    1989-1990 CHEVROLET V3500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: CHEYENNE

    1980 CHEVROLET K20 PICKUP

    • Liter: 7.4
    • Aspiration: N
    • SubModel: CUSTOM DELUXE
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8

    1972 CHEVROLET MONTE CARLO

    • CC: 6588
    • Liter: 6.6
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: S
    • CUI: 402
    • EngineType: V8

    1975-1980 CHEVROLET C10 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: CHEYENNE

    1963 CHEVROLET BISCAYNE

    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8

    1969 CHEVROLET K10 PICKUP

    • CC: 6489
    • Liter: 6.5
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: Y
    • CUI: 396
    • EngineType: V8

    1974 GMC K25/K2500 SUBURBAN

    • Liter: 7.4
    • EngineType: V8
    • SubModel: BASE

    1990 CHEVROLET C1500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: WT

    1966 CHEVROLET CORVETTE

    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8

    1987-1988 CHEVROLET R30 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SCOTTSDALE

    1969 GMC C25/C2500 SUBURBAN

    • Liter: 6.5
    • EngineType: V8
    • SubModel: BASE

    1970 CHEVROLET CHEVELLE

    • Liter: 6.6
    • SubModel: CONCOURS ESTATE
    • CUI: 402
    • EngineType: V8

    1972 CHEVROLET CHEVELLE

    • CC: 6588
    • Liter: 6.6
    • Aspiration: N
    • SubModel: GREENBRIER
    • Engine Vin: U
    • CUI: 402
    • EngineType: V8

    1972 CHEVROLET CHEVELLE

    • CC: 6588
    • Liter: 6.6
    • Aspiration: N
    • SubModel: CONCOURS ESTATE
    • Engine Vin: U
    • CUI: 402
    • EngineType: V8

    1968-1969 CHEVROLET C30 PICKUP

    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8

    1989-1990 CHEVROLET V3500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SILVERADO

    1979-1986 GMC C2500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SIERRA CLASSIC

    1987-1989 GMC V3500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SIERRA CLASSIC

    1972 CHEVROLET KINGSWOOD

    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8

    1972 CHEVROLET IMPALA

    • CC: 7439
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: V
    • CUI: 454
    • EngineType: V8

    1968-1969 CHEVROLET CORVETTE

    • Liter: 7.0
    • SubModel: BASE
    • CUI: 427
    • EngineType: V8

    1972 CHEVROLET KINGSWOOD

    • CC: 7439
    • Liter: 7.4
    • Aspiration: N
    • SubModel: ESTATE
    • Engine Vin: V
    • CUI: 454
    • EngineType: V8

    1980 CHEVROLET K30 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: CUSTOM DELUXE

    1970 CHEVROLET KINGSWOOD

    • Liter: 7.4
    • EngineType: V8
    • SubModel: BASE

    1970-1974 CHEVROLET BEL AIR

    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8

    1968-1969 CHEVROLET IMPALA

    • CC: 6489
    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8

    1971 CHEVROLET CHEVELLE

    • Liter: 7.4
    • EngineType: V8
    • SubModel: NOMAD

    1979-1980 GMC K1500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: BASE

    1979-1980 CHEVROLET C20 SUBURBAN

    • Liter: 7.4
    • EngineType: V8
    • SubModel: BASE

    1988-1990 GMC C3500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SIERRA SLX

    1971-1972 CHEVROLET KINGSWOOD

    • Liter: 6.6
    • SubModel: ESTATE
    • CUI: 402
    • EngineType: V8

    1976 CHEVROLET IMPALA

    • Liter: 7.4
    • EngineType: V8
    • SubModel: CUSTOM LANDAU

    1977 CHEVROLET K30 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: CHEYENNE

    1987-1990 GMC R3500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: BASE

    1968-1969 CHEVROLET CHEVELLE

    • Liter: 6.5
    • EngineType: V8
    • SubModel: NOMAD

    1987-1990 GMC R2500 SUBURBAN

    • Liter: 7.4
    • EngineType: V8
    • SubModel: BASE

    1979-1983 GMC C3500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SIERRA CLASSIC

    1972 CHEVROLET CHEVELLE

    • CC: 7439
    • Liter: 7.4
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: W
    • CUI: 454
    • EngineType: V8

    1979-1980 GMC C1500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SIERRA GRANDE

    1970-1974 CHEVROLET EL CAMINO

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SS

    1970 CHEVROLET MONTE CARLO

    • CC: 6588
    • Liter: 6.6
    • SubModel: BASE
    • CUI: 402
    • EngineType: V8

    1970 CHEVROLET IMPALA

    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8

    1975 CHEVROLET LAGUNA

    • Liter: 7.4
    • EngineType: V8
    • SubModel: S3

    1987-1988 CHEVROLET R20 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SILVERADO

    1968-1969 CHEVROLET C20 PICKUP

    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8

    1978-1980 CHEVROLET C10 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: BIG TEN

    1975-1978 GMC C15 SUBURBAN

    • Liter: 7.4
    • EngineType: V8
    • SubModel: BASE

    1972 CHEVROLET TOWNSMAN

    • CC: 6588
    • Liter: 6.6
    • Aspiration: N
    • SubModel: BASE
    • Engine Vin: S
    • CUI: 402
    • EngineType: V8

    1968 GMC C25/C2500 SUBURBAN

    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8

    1968-1969 CHEVROLET CAPRICE

    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8

    1987-1988 CHEVROLET R20 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SCOTTSDALE

    1987-1989 GMC R3500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SIERRA CLASSIC

    1969 CHEVROLET K10 SUBURBAN

    • Liter: 6.5
    • SubModel: BASE
    • CUI: 396
    • EngineType: V8

    1969 GMC K35/K3500 PICKUP

    • Liter: 6.5
    • EngineType: V8
    • SubModel: BASE

    1988-1990 CHEVROLET C3500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SCOTTSDALE

    1973 CHEVROLET LAGUNA

    • Liter: 7.4
    • EngineType: V8
    • SubModel: ESTATE

    1973-1978 GMC C25/C2500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: BASE

    1970 CHEVROLET IMPALA

    • CC: 7439
    • Liter: 7.4
    • SubModel: BASE
    • CUI: 454
    • EngineType: V8

    1974 CHEVROLET MALIBU

    • Liter: 7.4
    • EngineType: V8
    • SubModel: CLASSIC

    1988-1990 GMC K3500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SIERRA SLX

    1971 CHEVROLET EL CAMINO

    • Liter: 6.6
    • SubModel: CUSTOM
    • CUI: 402
    • EngineType: V8

    1972 CHEVROLET CHEVELLE

    • CC: 7441
    • Liter: 7.4
    • SubModel: BASE
    • EngineType: V8

    1980 CHEVROLET K10 PICKUP

    • Liter: 7.4
    • Aspiration: N
    • SubModel: SILVERADO
    • Engine Vin: S
    • CUI: 454
    • EngineType: V8

    1979-1980 CHEVROLET C20 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: CUSTOM DELUXE

    1969 GMC C25/C2500 PICKUP

    • Liter: 6.5
    • EngineType: V8
    • SubModel: BASE

    1969 GMC C35/C3500 PICKUP

    • Liter: 6.5
    • EngineType: V8
    • SubModel: BASE

    1972 CHEVROLET CHEVELLE

    • Liter: 7.4
    • SubModel: MALIBU
    • CUI: 454
    • EngineType: V8

    1988-1990 CHEVROLET K3500 PICKUP

    • Liter: 7.4
    • EngineType: V8
    • SubModel: SCOTTSDALE
    121 - Mr. Gasket Intake Manifold Gasket Sets is rated 5.0 out of 5 by 1.
    • 2016-09-26T08:20CST
    • bvseo_cps, prod_bvrr, vn_cps_3.4.0
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_1
    • loc_en_US, sid_10001_10001_29840, PRD, sort_relevancy
    • clientName_jegs
    Rated 5 out of 5 by from Intake gasket Gaskets fit great on my hp intake on my 454 Chevy SS
    Date published: 2015-11-10
    • 2016-09-26T08:20CST
    • bvseo_cps, prod_bvrr, vn_cps_3.4.0
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_1
    • loc_en_US, sid_10001_10001_29840, PRD, sort_relevancy
    • clientName_jegs
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