Page 384 - 2018 Master Catalog

SEAL-4-GOOD REUSABLE XX CARBON GASKETS GRAPH-FLEX GASKETS
GASKETS
This material withstands long term exposure to The GRAPH-FLEX gasket seals header flanges
SEAL-4-GOOD reusable flange gaskets are multi- over 2000° F, this makes for a long life gasket! when nothing else will -- Even on warped or
layered and made from special “DEAD SOFT” The XX Carbon line of gaskets offers superior damaged flanges.
aluminum which conforms to header flanges for sealing ability even on the worst flange surfaces.
the ultimate seal. These gaskets are perfect for even nitrous, turbo, Made with Percy’s stainless metal core and 100%
and blower motors. Graphite. Has extreme temperature resistance.

DESCRIPTION PORT SHAPE PORT DIMENSIONS SEAL-4-GOOD XX CARBON GRAPH-FLEX
2-1/2” Collector --- 2.5” 66001 68001 67001
3” Collector --- 3” 66002 68002 67002
3-1/2” Collector --- 3.5” 66003 68003 67003
Chevy Small Block, 265-400 - Stock Port Round 1.50” 66011 68011 67011
Chevy Small Block, 265-400 - Stock Port Square 1.50” 66012 68012 67012
Chevy Small Block, Vortec 5.0L / 5.7L 96-00 - Corvette 82-91 Round 1.50” 66121 68021 67021
Chevy Small Block, LT1 / LT4 / ZZ4 1992-97 D Port 1.38” 66031 68031 67031
Chevy Big Block, 396-454 & 502 - Race Port Round 2.15” 66125 68025 67025
Chevy Big Block, 396-454 & 502 - Race Port Square 2.125” 66013 68013 67013
Chevy Big Block, 396-454 & 502 - Stock Port Round 1.875” 66019 68019 67019
Chevy Big Block, 396-454 & 502 - Stock Port Square 1.92” x 1.88” 66124 68024 67024
Chevy LS Gen III, LS1 / LS2 / LS3 / LS6 / Truck - Stock Port Round 1.90” 66087 68087 67087
Chevy LS Gen III, LS1 / LS6 / Truck - Weld Bead Header Round 1.70” 66032 68032 67032
Chevy LS Gen III, 7.0L LS7 Corvette Z06 2006-13 D Port 2.00” x 1.75” 66028 68028 67028
Ford Small Block, 221-302, 351W Rectangle 1.63” x 1.25” 66014 68014 67014
Ford Small Block, 221-302, 351W Oval 1.75” x 1.125” 66018 68018 67018
Ford Small Block, 351C 2 bbl 351M - 400 Stock Oval 1.94” x 1.65” 66051 68051 67051
Ford Small Block, 351C 4 bbl 302 Boss, HO & Cobra Jet Stock Rectangle 1.88” x 2.25” 66052 68052 67052
Ford Big Block, 429-460 Except Cobra Jet Oval 2.06” x 1.38” 66035 68035 67035
Ford Big Block, FE 332, 352, 390, 410, 428 Stock Rectangle 2.38” x 1.56” 66053 68053 67053
Ford Modular, 4.6 / 5.4L 2-Valve Round 1.62” 66033 68033 67033
Ford Modular, 4.6 / 5.4L 3-Valve - Headers Round 1.70” 66055 68055 67055
Ford Modular, 4.6L 4-Valve DOHC Oval 2.125” x 1.25” 66034 68034 67034
Ford Modular, 4.6 / 5.4L 3-Valve OEM D Port 1.688” x 1.563” 66081 68081 67081
Ford Modular, 5.0L Coyote Mustang 2011+ Round 1.90” 66090 68090 67090
Ford Modular, Shelby GT500 5.4L DOHC Oval 2.06” x 1.40” 66082 68082 67082
Chrysler Small / Big Block, 383, 400, 413, 426 Wedge, 440 Rectangle 1.75” x 1.50” 66036 68036 67036
Chrysler Small / Big Block, 273, 318, 340, 360 Rectangle 1.13” x 1.00” 66037 68037 67037
Oldsmobile 330-455 - Stock Port Rectangle 1.44” x 1.94” 66039 68039 67039
Pontiac 326-455 - Large Race Port Oval / D Port 2.00” x 1.50” 66041 68041 67041
AMC 290, 304, 360, 390, 401 Dog Leg 1.77” x 1.51” 66044 68044 67044

CARBURETOR BASEPLATE
GASKETS - EMR

PART NO. DESCRIPTION

66021 Holley Square Single Hole
66025 Holley Square Bore 4 Hole
66022 Holley Dominator
66023 Holley / Quadrajet Spread Bore
66024 Holley 2 Barrel

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