Weber Carburetor Carburetor Adapter Plate

Weber Carburetor Adapter Plates: The Right Fit for a Classic Upgrade

When it comes to swapping out a worn or inefficient factory carburetor for a high-performance Weber unit, the adapter plate is the critical link that makes it all possible. Weber Carburetor — a brand with roots stretching back to 1923 and a motorsport legacy that includes supplying carburetors to Alfa Romeo and Maserati racing cars — produces adapter plate kits that are engineered specifically around their own carburetor families. That pedigree matters: a Weber adapter plate is designed to match Weber bolt patterns, port geometry, and gasket surfaces precisely, minimizing the guesswork that comes with generic aftermarket solutions.

What a Weber Adapter Plate Does

An carburetor adapter plate serves as the mechanical interface between an engine's intake manifold and a replacement carburetor. Because different carburetors use different bolt patterns, flange dimensions, and port sizes, a purpose-built adapter plate is essential for a leak-free, properly aligned installation. Weber's adapter plates are catalogued by both the Weber carburetor model they accept and the original factory carburetor or manifold bolt pattern they replace — making application matching straightforward for the installer.

Weber's DG Series Adapter Plate Kits

The majority of Weber's adapter plate lineup centers on their popular DG Series two-barrel downdraft carburetors — including the DGV, DGAV, DGEV, DGAS, and DGMS variants. These Weber models use a 46 x 93 mm bolt pattern, which differs from the mounting dimensions found on many Japanese, European, and American factory carburetors. Weber's adapter kits bridge this gap for a wide range of platforms:

• Mazda B2000 & B2200 pickups — Dedicated adapter kits allow Weber DG Series carburetors to bolt directly onto 1986–1990 Mazda pickup intake manifolds.
• Toyota engines (2TC, 3TC, 3A, 4A) — Application-specific plates adapt the Toyota manifold stud pattern to accept Weber DGV, DGAV, and DGAS carburetors.
• Datsun / Nissan & Suzuki engines — Plates designed for Datsun L16, L18, and L20B engines, as well as Suzuki and Mitsubishi applications, are part of the Weber adapter family.
• Hitachi carburetor replacements — The 99004.333-style kit converts the Hitachi stud pattern (80 x 44 mm) to accept Weber DGV, DGAV, or DGEV carburetors, commonly used on Suzuki Samurai and similar platforms.
• Honda & Nissan engines — Adapter plate kits convert the 37 x 63 mm Japanese bolt pattern to the 46 x 93 mm Weber DG flange.
• Jeep, Ford, AMC & Chevy (1-barrel manifolds) — Adapter kits allow a 2-barrel Weber DGV, DGAV, or DGEV to mount on single-barrel manifolds, a popular upgrade path for Jeep CJ and similar vehicles.

What Comes in a Weber Adapter Kit

Weber adapter plate kits are typically sold as complete installation packages. Most include the machined adapter plate itself, the required mounting gaskets, and all necessary hardware — so builders have everything needed for a clean, properly sealed installation without sourcing secondary components separately.

Why Choose a Weber-Branded Adapter Plate

Because Weber adapter plates are designed around the exact flange dimensions and port openings of Weber's own carburetor families, they deliver a tighter fit and better port alignment than universal adapters. For enthusiasts performing a Weber carburetor conversion — whether on a classic Jeep, a vintage Japanese pickup, or a European sport compact — starting with a genuine Weber adapter plate ensures the foundation of the swap is as precise as the carburetor itself. Browse the full Weber Carburetor brand page or explore the complete carburetor adapter plate category to find the right kit for your application.