Shear Plate 4500 2.125 Bore

The Shear Plate 4500 2.125 Bore is a precision-engineered carburetor adapter designed for serious engine builders and performance enthusiasts working with Dominator-style flanged carburetors. This aluminum shear plate serves as the critical interface between your fuel delivery system and intake manifold, ensuring proper carburetor sealing and alignment while maintaining the exact bore diameter required for optimal fuel atomization. Whether you're assembling a competition engine, restoring a classic muscle car, or upgrading a street machine, this component is essential for carburetor installation on compatible platforms.

Manufactured from lightweight aluminum and finished in natural (unpainted) condition, the Shear Plate 4500 features a 0.5-inch thickness that provides structural rigidity without unnecessary weight. The 2.125-inch bore diameter matches high-flow carburetor specifications, while the four-hole mounting pattern aligns precisely with Dominator flange carburetors. At just 0.97 pounds, this adapter plate minimizes parasitic weight while maintaining the durability required for both street and track applications. The machined aluminum construction ensures consistent bore concentricity and eliminates fuel leakage at the carburetor-to-manifold junction—critical for reliable engine operation under varied load conditions.

This shear plate is ideal for anyone installing or replacing a four-hole Dominator-flange carburetor and needing a precision adapter that matches OEM or aftermarket intake manifold specifications. Installation is straightforward: position the plate between the carburetor and manifold, align the four mounting holes, and secure with appropriate fasteners. Technicians working on tunnel-ram applications, single-plane or dual-plane manifolds, and dedicated race engines will appreciate the exact bore matching and leak-free sealing this component delivers. Verify your intake manifold's bore diameter and Dominator flange compatibility before ordering to ensure proper fit.