GASKETS
Pontiac 326-455 Head Gaskets
Cometic MLS
Fel Pro / Fel-Pro OEM
Application
Gasket Bore
Thickness
389/400/421/428/455 389/400/421/428/455 389/400/421/428/455
4.160" 4.200" 4.300" 4.300" 4.300" 4.380"
.040" .040" .039" .039" .040" .040"
CAGC5711-040 CAGC5769-040
— —
— —
FEL1016
1958-79, 326-455, OEM Stock Replacement PermaTorque
FEL8518PT †
389/400/421/428/455
CAGC5712-040 CAGC5846-040
— —
428/455
† Fel-Pro OEM
Intake Gaskets
Port Dimensions Thickness 1.17" x 2.30" .060"
Fel Pro / Fel-Pro OEM
SCE Accuseal E
Application 326-455 326-455
Mr Gasket
Edelbrock
Mahle
—
— —
— — M77MS20101
Stock Stock
N/A
FELMS9980
— — — —
— —
MRG502G, MRG5848 ††
1972-79, 350/400/455, OEM Stock Repl. 1969-72, 400/455, Ram Air IV, High-Output OEM Stock Repl. 1965-79, 326-455, Exc. 400 Ram Air 1965-79, 326-455, 400 Ram Air 1965-79, 326-455,400 Ram Air
Stock FELMS90205 †
— EDE7280
—
—
Stock
Stock FELMS90123 †
1.14" x 2.06" .062" 1.18" x 2.20" .060" 1.18" x 2.20" .062" 1.175" x 2.300" .062"
— MRG502G, MRG5848 ††
— —
— — —
FEL1233
— EDE7280
—
— MRG503G
— —
Modified Port
—
—
—
SCE128105
† Fel-Pro OEM. †† Ultra-Seal gaskets.
Die-Cut Fiber/Graphite/Steel Core Exhaust Gaskets
Taylor XX Carbon
Application
Port Size
Fel Pro
Mr. Gasket
Edelbrock
Remflex
Mahle
326-45, All with Split Center
1.46" x 1.92" 1.46" x 1.93"
FEL1424
—
—
— — — —
— — — —
— — — — — — —
1965-79, 326-455, Open Center Port
—
— MRG5920 †
326-455. Exc. 400. Ram Air, 455 HO/SD 1.53" x 2.00"
FEL1423
—
—
MRG550G, MRG5921 † MRG550G, MRG5921 †
1965-79, 326-455, “D” Port
1.55" x 1.94"
— TAY68041
— REM12-001
326-455, Split Center Port
1.55" x 1.94"
— TAY68041
1968-70, 400 Ram Air, 455 HO/SD 400-455 Ram Air IV/SD/HO 326-455, D-Port, .060", Steel Embossed 400-455, Ram Air/SD/Edelbrock, .060", Steel Embossed
1.88" Dia.
FEL1436
— — — — —
— EDE7281
—
1.875" 1.900"
— — — —
— — — —
— REM12-002
— —
— M77MS19989 — M77MS19990
1.875" Dia.
326-455, 1958-79 D-Port, Header Apps. 1-1/2" x 1-15/16"
— REM12-004
—
† Ultra-Seal gaskets.
Alloy Exhaust Gaskets
Port Dimensions
Mr. Gasket CopperSeal MRG7171
SCE Pro Copper SCE4128 SCE4028
Fel Pro MLS
Application
326-455, Exc. Ram Air/HO., Split Center Port
1.55" x 2.00"
— — —
400-455, Ram Air/HO, and Edelbrock Heads, Round Port
Stock
—
1963-79 326-455 with D-Port Heads
1.55" x 1.94" 1.845" Dia.
MRG7418G
— —
1968-74 400-455, Round Port
—
FELMS90111
Valve Cover Gaskets Application
Construction
Thickness Fel Pro/Fel-Pro OEM Mr. Gasket
Mahle
Edelbrock
MRG576, MRG5869 †
1965-79, 326-455 1965-79, 326-455
Cork/Rubber Cork/Rubber Cork/Rubber
3/16"
FEL1622 FEL1627
— — —
— — — — —
1/4"
— —
1965-79, 326-455, OEM Stock Repl.
5/32"
FELVS50005C ††
326-455 326-455 326-455
Cork/Composite Cork/Composite Composite/Core
1/8" 1/4"
— — —
— M77VS50823 — M77VS50824
3/16"
—
— EDE7590
† Ultra Seal gaskets. †† Fel-Pro OEM.
490 2021-22 ENGINE BUILDER CATALOG
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