1-3/8in Carb Studs

The 1-3/8in Carb Studs from MOROSO (MPN 37950) are precision-engineered fasteners designed for carburetor mounting applications where reliability and repeatability matter. Built for engine builders, performance mechanics, and restoration enthusiasts, these studs eliminate the inconsistency of standard bolts by providing a secure, indexed connection between your carburetor and intake manifold. Whether you're tuning a street engine, prepping a race car, or restoring a classic, quality carburetor studs are foundational to leak-free fuel delivery and stable idle characteristics.

These studs feature a bullet nose design and are manufactured from steel with zinc oxide plating for corrosion resistance in engine bay environments. Available in dual thread configurations—5/16-18 and 5/16-24—they accommodate various carburetor flange thicknesses and manifold port designs without modification. The 1.375-inch length positions the fastener correctly relative to carburetor body geometry, ensuring proper clamp load distribution across the gasket sealing surface. Zinc oxide plating provides a protective barrier against rust while maintaining mechanical properties and ease of installation over the engine's service life.

A set of four studs covers the typical four-bolt carburetor flange pattern found on most small-block and mid-block engines. Mechanics favor MOROSO studs for their tight tolerances and consistent performance across rebuild cycles—critical when you're diagnosing fuel system leaks or vacuum issues. Installation is straightforward: thread studs into the intake manifold, set gasket and carburetor, and secure with matching nuts. These studs are essential for anyone serious about carburetor installation, whether you're upgrading to a larger carb, rebuilding an original setup, or swapping powerplants.