Heat Insulator Gasket - Divided Sq. Bore

The Edelbrock Heat Insulator Gasket for divided square bore carburetors (part number 9266) is a composite insulator gasket designed to reduce heat transfer from the engine intake manifold to the carburetor base plate. This thermal barrier helps stabilize fuel temperature, prevent vapor lock under sustained high-load conditions, and maintain consistent carburetor performance across varying ambient temperatures and engine operating states.

Manufactured as a 0.375-inch thick composite material, this gasket kit includes all necessary mounting hardware for installation between a four-barrel carburetor base and the intake manifold. The divided square bore design provides the seal pattern required for Edelbrock's divided-plenum carburetor lineup. The composite construction maintains structural integrity under thermal cycling while resisting fuel and oil exposure, common failure modes of traditional cork or rubber gaskets in high-temperature underhood environments.

This heat insulator gasket is engineered for carburetor tuning applications where manifold heat rise compromises air-fuel metering stability. Users rebuilding or upgrading carburetor systems will recognize the necessity of a quality insulator gasket to preserve calibration, reduce hot-start issues, and extend carburetor component life. Edelbrock's reputation in carburetor development makes this OEM-equivalent component a proven solution for enthusiasts prioritizing repeatability and durability in naturally aspirated engine builds.