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![Performance Intake Manifold Gaskets for 1965-1990 Chevy 396-454 Big Block [Rectangle Raised Port]](https://www.jegs.com/images/mini_750/700/720/720-121.jpg)
Vehicle Info NeededMR GASKETPART NUMBER: 720-121
Performance Intake Manifold Gaskets for 1965-1990 Chevy 396-454 Big Block [Rectangle Raised Port]
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$3354
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Lowest Price GuaranteeChevrolet - Big Block
Performance Intake Manifold Gaskets1965-1990 Chevrolet 396-454 Big Block Chevy Rectangle Raised Port Heads 0.060 in. Thickness Trimmable for Modified Port Applications Cellulose and Nitrile Composition
Raised port Big Block Chevy heads move the intake opening away from where a standard gasket expects it, and a mismatch there costs airflow at exactly the point the engine is trying to fill the cylinder. These are cut for the raised pattern and can be opened further to follow a ported head.
Mr. Gasket 121 Performance Intake Manifold Gaskets Features:
- Fits 1965-1990 Chevrolet 396-454 Big Block Chevy engines with rectangle raised port heads.
- 0.060 in. thickness.
- Manufactured from cellulose and nitrile composition gasket material.
- Can be trimmed if necessary for modified port applications.
- For original equipment replacement, high performance street, drag race and oval track use.
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. All Mr. Gasket Intake Gaskets are sold in pairs unless specified otherwise.
Performance Material
- Manufactured from cellulose/nitrate composition gasket material
- Provides excellent sealing and durability
- Can be trimmed if necessary for modified ports
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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 an engine
Part TypeIntake Manifold Gasket
Product LineMr. Gasket Intake Manifold Gasket Sets
BrandMR GASKET
Package Height0.2
Package Width4.3
Package Length22.0
Weight0.33 PG
Part CategoryReplacement Parts
Water Crossover StyleOpen
PositionN/A
ColorGrey
QuantitySold as a set
Port Width1.75 in (44.5 mm)
Port StyleRectangular raised port
MaterialPerformance
Engine Make/SizeChevy Big Block (396-454)
Thickness0.060 in
Port Height2.5 in (63.5 mm)
Port ShapeRectangle
Gasket MaterialCellulose Nitrile Composition
Part FitmentDirect Fit
Vendor Part Number121
Package Qty1
Package TypeEA
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