Edelbrock Heat Insulator Gasket 0.320-inch for Performer & Thunder Series AVS — nitrile composite, extended studs

The Edelbrock 9266 Heat Insulator Gasket is a 0.320" nitrile rubber composite 4-barrel gasket that reduces fuel percolation for Performer and Thunder Series AVS carburetors and includes extended carburetor studs.

If your high-performance engine runs hot underhood and you want a simple, reliable barrier between the carburetor and intake manifold, the Edelbrock 9266 provides a purpose-built thermal and fuel-sealing solution. Engineered for Edelbrock Performer and Thunder Series AVS carburetors, this gasket combines material choice, thickness and a divided center design to limit fuel vaporization and maintain consistent carburetor operation under elevated temperatures.

How does this gasket reduce fuel percolation?

The 9266 uses a nitrile rubber composite that resists heat and helps seal the mating surfaces between the carburetor and manifold. Its 0.320" thickness increases the thermal break compared with thinner gaskets, slowing heat transfer and lowering the chance of fuel vapor forming near the carburetor bowl.

• 0.320-inch thickness provides a measurable thermal barrier
• Nitrile rubber composite resists fuel and heat exposure
• Precisely cut sealing edges fit the carburetor base to block leaks

Will this fit my Performer or Thunder Series AVS carburetor?

The 9266 is designed specifically for Edelbrock Performer and Thunder Series AVS four-barrel carburetors. The pattern, hole spacing and divided center accommodate AVS models while matching the bolt and manifold geometry used on these applications.

• Made to align with Edelbrock AVS carburetor bolt patterns
• 4-barrel layout and 2-hole divided center match common AVS designs
• Includes extended studs to ensure proper carburetor mounting height

What are the physical and installation details I should know?

This gasket measures 0.320 inches thick and features a two-hole divided center to isolate center passages. It ships with extended carburetor studs to help maintain correct spacing and make installation easier, especially when stacking aftermarket spacers or insulators.

• Thickness: 0.320" for added insulation and spacing
• Two-hole divided center for center passage separation
• Extended studs included for correct mounting and easier installation

How does the 2-hole divided center help performance?

The divided center separates the central passages, which can reduce cross-talk and help the carburetor's bowls remain more thermally isolated. This can contribute to steadier fuel metering by minimizing localized heating and keeping fuel in liquid form until it reaches the metering circuits.

• Divided center reduces thermal interaction between center passages
• Helps maintain consistent fuel delivery under elevated temperatures
• Works with AVS carburetor design to preserve calibration and response

Who is this for: The Edelbrock 9266 is made for classic and performance enthusiasts running Edelbrock Performer or Thunder Series AVS four-barrel carburetors who need a reliable thermal barrier and proper mounting height. It’s especially useful for street/strip vehicles, hot-rodders and anyone experiencing fuel percolation or inconsistent carburetor behavior from underhood heat. If you use aftermarket spacers or require slightly taller fastener length to accommodate installation, the included extended studs simplify setup while the nitrile composite helps the carburetor run more consistently in demanding thermal environments.