Carburetor Gaskets

While it may look relatively simple, a carburetor base plate gasket does a few very important jobs. For starters, a good carb mounting gasket will ensure an airtight...

While it may look relatively simple, a carburetor base plate gasket does a few very important jobs. For starters, a good carb mounting gasket will ensure an airtight seal between the carburetor body and the intake manifold. A proper seal is very important here, because even a small leak can greatly affect the way your carbureted engine performs. A leaky carb seal also makes it really difficult to properly tune your carburetor and can contribute to a ton of other engine issues, including things like a poor idle, hesitation upon acceleration, and a loss of top-end power.

A carb mounting gasket can also act as a thermal barrier...

A carb mounting gasket can also act as a thermal barrier between a baking-hot intake manifold and the carburetor flange. By creating more isolation between those two mating surfaces, a good carb base plate gasket can mitigate a lot of heat soak coming from the engine—which can go a long way to prevent nagging fuel delivery problems like vapor lock.

And while carb mounting gasket thickness is often associated with its ability to block heat, there are a few other factors that need to be considered when selecting the thickness of your carburetor gasket. For instance, you may need to raise your carburetor body up a bit to provide room for vacuum ports or, conversely, opt for a thinner gasket to ensure proper hood clearance.

There are plenty of carburetor base plate gasket options available. To determine which one is right for your engine and carburetor, first determine the type of carburetor flange you’ve got. Common flange designs include square bore and spread bore, but there are several other flange layouts depending on the carburetor model you’re running.

Once you’ve determined the type of carburetor flange you’ve got (spread bore, square bore, etc.), then you can choose the overall carburetor base gasket thickness you need, followed by the type of material you want your carburetor gasket made from. Carb mounting gaskets are commonly made from paper, yet several nitrile rubber and other composite materials are popular as well. Each material has its pros and cons, so you may want to do a quick bit of research before selecting the best carburetor gasket material for your engine.

Spread bore or square bore, two barrel or four, when you’re ready to start shopping for carburetor base plate gaskets, use the intuitive filters on SummitRacing.com to pinpoint the precise one you need.

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Wilson Manifolds Carburetor Base Plate Gaskets 840001

Wilson Manifolds Carburetor Base Plate Gaskets 840001

Carburetor Base Plate Gasket, Open Center Style, Paper, 4-Barrel Square Bore, Each

Part Number: WSN-840001

5.0 out of 5 stars ( 4 )

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Wilson Manifolds Carburetor Base Plate Gaskets 840002

Carburetor Base Plate Gasket, 4-Hole Style, Paper, 4-Barrel Square Bore, Each

Part Number: WSN-840002

5.0 out of 5 stars ( 3 )

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Wilson Manifolds Carburetor Base Plate Gaskets 840003

Carburetor Base Plate Gasket, Open Center Style, Paper, Dominator, Each

Part Number: WSN-840003

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Wilson Manifolds Carburetor Base Plate Gaskets 840004

Carburetor Base Plate Gasket, 4-Hole Style, Paper, Dominator, Each

Part Number: WSN-840004

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Edelbrock Slingshot Manifold to Carburetor Adapter Gaskets 8700

Carburetor Gasket, Manifold to Adapter, Paper, Flathead, V8, Edelbrock Slingshot Manifold Only, Ford, Each

Part Number: EDL-8700

Not Yet Reviewed

Estimated Ship Date: Dec 23, 2025 if ordered today

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Estimated Ship Date: Dec 23, 2025 if ordered today

Stromberg Carb to Manifold Gasket Packs 69447K

Gasket, Carburetor Base, Nitrile/Butadiene, 3-Bolt Flange, Stromberg, 2-Throttle Bores, Set of 6

Part Number: SBC-69447K

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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Stromberg Carb to Manifold Gasket Packs 69447K-BIG

Gasket, Carburetor Base, Nitrile/Butadiene, 3-Bolt Flange, Stromberg, 2-Barrel, Open Center, Set of 6

Part Number: SBC-69447K-BIG

Not Yet Reviewed

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Edelbrock Heat Insulator Gaskets 9267

Heat Insulator Gaskets, for EDL Dual-Quad Manifold Use, Nitrile Rubber Composite, Square Bore, 4-Hole, Kit

Part Number: EDL-9267

3.75 out of 5 stars ( 8 )

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Cometic Powersport Gaskets Carburetor Base Plate Gaskets 68-9088

CARB TO MANIFOLD SEAL H-D TWIN CAM

Part Number: CVT-C9088

Not Yet Reviewed

Estimated Ship Date: Dec 10, 2025 if ordered today

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Estimated Ship Date: Dec 10, 2025 if ordered today

Edelbrock Carburetor Base Gaskets 3899

Carburetor Base Gaskets, Nitrile Rubber Composite, 4-Barrel, Square Bore, Open Center, .032 in. Thick, Pair

Part Number: EDL-3899

4.98 out of 5 stars ( 40 )

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Fel-Pro Performance Carburetor Insulator Gaskets 1908

Carburetor Mounting Gasket, Insulator Gasket, Paper, 4-Barrel, Spread Bore, Open Center, 1/4 in. Thick, Each

Part Number: FEL-1908

5.0 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

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Demon Carburetion Carburetor Base Plate Gaskets 200035

Carburetor Mounting Gasket, Composite, 4-Barrel, Square Bore, Open Center, Set of 10

Part Number: DEM-200035

4.88 out of 5 stars ( 16 )

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Edelbrock Carburetor Base Gaskets 12410

Carburetor Base Gaskets, Nitrile Rubber Composite, 4-Barrel, Square Bore, Open Center, .032 in. Thick, Kit

Part Number: EDL-12410

4.6 out of 5 stars ( 10 )

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Quick Fuel Carburetor Base Gaskets 8-1105QFT

N/S 4 Hole Flan. Gasket 4150

Part Number: QFT-8-1105QFT

3.33 out of 5 stars ( 6 )

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Quick Fuel Carburetor Base Gaskets 8-1106QFT

N/S 4 Hole Flan. Gasket 4500 2 1/8"

Part Number: QFT-8-1106QFT

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Quick Fuel Carburetor Base Gaskets 8-102QFT

Carburetor Base Gasket, 4-barrel, Square Bore Flange, Open Center Style, Paper, 0.063 in. Thick, Each

Part Number: QFT-8-102QFT

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Quick Fuel Carburetor Base Gaskets 8-100QFT

Carburetor Base Gasket, Holley 2-barrel Flange, 2-hole Opening Style, Paper, 0.063 in. Thick, Each

Part Number: QFT-8-100QFT

4.5 out of 5 stars ( 2 )

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Quick Fuel Carburetor Base Gaskets 8-1104QFT

Carburetor Base Plate Gasket, Open Center, Dominator, 4500, Composite, 0.063 in., Pair

Part Number: QFT-8-1104QFT

1.67 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Fel-Pro Performance Carburetor Insulator Gaskets 1905

Carburetor Mounting Gasket, Paper, 4-Barrel, Spread Bore, 4-Hole, Each

Part Number: FEL-1905

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Keyser Manufacturing Carburetor Base Plate Gaskets 100 7777

Carburetor Mounting Gasket, Composite, 4-Barrel, Square Bore, Open Center, .045 in. Thick, Each

Part Number: KYS-100-7777

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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Quick Fuel Carburetor Base Gaskets 8-1107QFT

Carburetor Base Gasket, 4-Barrel Dominator, 4-hole Style, Paper with Silicone Coating, 0.062 in. Thick, Each

Part Number: QFT-8-1107QFT

5.0 out of 5 stars ( 1 )

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Flatout Gaskets Carburetor Mounting Gaskets 1003

Carburetor Mounting Gasket, Paper, 4-Barrel, Dominator, Open Center, .060 in. Thick, Each

Part Number: FOG-1003

Not Yet Reviewed

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Quick Fuel Carburetor Base Gaskets 8-105QFT

Carburetor Base Gasket, 4-barrel, Square Bore Flange, 4-hole Style, Paper, 0.063 in. Thick, Each

Part Number: QFT-8-105QFT

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Flatout Gaskets Carburetor Mounting Gaskets 1185.2

Carburetor Mounting Gasket, Paper with Silicone Coating, 4-barrel, Dominator, 4-Hole, .040 in. Thick, Each

Part Number: FOG-1185-2

Not Yet Reviewed

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Flatout Gaskets Carburetor Mounting Gaskets 1003.2

Carburetor Mounting Gasket, Paper with Silicone Coating, 4-barrel, Dominator, Open Center, .030 in. Thick, Each

Part Number: FOG-1003-2

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Dec 11, 2025 if ordered today

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Estimated Ship Date: Dec 11, 2025 if ordered today

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Fel-Pro Performance Carburetor Mounting Gaskets 1903

5 out of 5 stars ( 5 )

Estimated Ship Date: Tomorrow

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