Base Gasket .250in

The MR. GASKET Base Gasket .250in (MPN 758) is a precision carburetor base plate gasket engineered for 4-barrel carburetors with square bore configuration. This composite gasket serves as the critical seal between your carburetor base and intake manifold, preventing fuel and air leaks that would compromise engine performance and fuel economy. Whether you're rebuilding a classic muscle car, restoring a vintage hot rod, or maintaining a performance street engine, a quality base gasket is non-negotiable for reliable carburetor operation and consistent jetting response.

Manufactured from durable composite material, this 0.25-inch thick gasket is designed to withstand thermal cycling and fuel exposure while maintaining a consistent seal under varying engine loads. The square bore design ensures proper alignment with four-hole mounting patterns found on most 4-barrel carburetors, allowing for even clamping pressure and preventing fuel seepage at the critical carburetor-to-manifold interface. The composite construction resists fuel degradation better than traditional paper gaskets, extending service life and reducing the risk of mid-season carb rebuilds caused by gasket failure or fuel saturation.

This gasket is ideal for mechanics and enthusiasts performing carburetor rebuilds, intake manifold work, or complete engine overhauls on vehicles equipped with 4-barrel carburetors. Installation is straightforward—simply position the gasket between the carburetor base and manifold, ensuring all four bolt holes align, then torque fasteners evenly in a crisscross pattern to prevent warping. The compact 0.29 lb weight and standard packaging make storage and handling convenient. Verify your carburetor's bolt pattern and base configuration before ordering to ensure compatibility with your specific application.