Holley Carb Gasket Open Center. Fits AFB

The Holley Carb Gasket Open Center designed to fit AFB carburetors is an essential sealing component for any serious carburetor rebuild or restoration project. Whether you're restoring a classic muscle car, rebuilding a high-performance engine, or maintaining a vintage street machine, this FEL-PRO gasket ensures a leak-free seal between the carburetor base plate and the intake manifold. Open-center gaskets like this one are specifically engineered for square-bore four-barrel applications where fuel distribution and air-fuel mixture control depend on precise sealing to prevent vacuum leaks that compromise engine performance and drivability.

Manufactured from composite material, this gasket features a 0.063-inch thickness that provides optimal compression and durability without excessive squeeze-out during installation. The open-center design allows fuel to flow through the gasket material to the idle circuit and main jets, maintaining the AFB carburetor's precise fuel metering capabilities. FEL-PRO's composite construction resists fuel degradation, heat cycling, and age-hardening—critical factors in vintage carburetors where original rubber gaskets often become brittle and fail. The gasket's flat profile ensures even contact across the square-bore mounting surface, eliminating high spots that can cause localized leaks and vacuum issues that trigger stumble, hesitation, or rough idle symptoms.

Technicians and enthusiasts working on AFB-equipped engines—particularly those in classic Chevrolet, Pontiac, and Oldsmobile applications—will find this gasket essential during any carburetor rebuild, manifold swap, or intake gasket service. Installation is straightforward: place the gasket on the carburetor base plate, align the fuel ports, and torque the mounting bolts evenly in a cross pattern to ensure uniform compression. Keeping a spare on hand is recommended, as original equipment gaskets often cannot be reused after removal. This single gasket is the difference between a leak-free, stable idle and a fuel-weeping, vacuum-plagued engine that hunts for RPM.