Mr. Gasket Carburetor Adapter Plate

Mr. Gasket Carburetor Adapter Plates: The Smart Solution for Carb-to-Manifold Compatibility

When a carburetor swap leads you to a mismatched intake manifold, replacing the entire manifold can be a costly and time-consuming route. Mr. Gasket has long offered a more practical answer: precision-engineered carburetor adapter plates that bridge the gap between different flange configurations without breaking the bank or requiring a full intake swap.

A Racing Heritage Behind Every Adapter

Drag racer Joe Hrudka launched Mr. Gasket more than half a century ago, in 1964, using his own '57 Chevy as a rolling test bed. Building a name competing at Cleveland-area tracks Norwalk and Dragway 42, Hrudka quickly established Mr. Gasket as the go-to source for racers with parts that sealed perfectly every time and withstood the punishing temperatures and pressures of racing. That same real-world, race-proven philosophy carries directly into Mr. Gasket's carburetor adapter plate lineup today.

What Mr. Gasket Carburetor Adapter Plates Do

The Mr. Gasket Carburetor Adapter Kit allows you to install a square flange carburetor — such as a Holley 4150, 4160, Edelbrock, or Carter AFB — onto a Quadra-jet or Thermoquad 4-barrel spreadbore intake manifold. And it works in reverse: flip it over and it allows you to install a spreadbore carb onto a square bore intake manifold. This bidirectional versatility makes Mr. Gasket adapters one of the most flexible solutions in the category.

The lineup also includes adapters that handle 4-bolt, 4-barrel carburetors mated to 4-bolt, 2-barrel intake manifolds — or 4-bolt, 2-barrel carburetors to 4-bolt, 4-barrel intake manifolds. Whether you're building a budget street machine or hot-rodding a classic muscle car, there's likely a Mr. Gasket adapter to fit the bill.

Die-Cast Aluminum Construction with Complete Hardware

Mr. Gasket adapter plates are built from die-cast aluminum, offering a strong, lightweight foundation that resists warping under heat cycles. Available thicknesses in the lineup include 3/4-inch and 1-inch open-center designs, giving builders options depending on underhood clearance and plenum volume preferences. Each adapter installs simply between the intake manifold and carburetor, and comes complete with gaskets, studs, nuts, and washers — everything needed to finish the job in one kit without a separate trip to the hardware store.

Broad Carburetor Compatibility

Mr. Gasket has engineered its adapter plates to work across a wide range of popular carburetor and manifold combinations. Compatible carburetors include Holley, Carter AFB and AVS, Demon Race, Speed and Road, and Edelbrock Performer square flange carburetors. This broad coverage makes these adapters particularly valuable for builders mixing and matching components from different eras or manufacturers.

Part of a Trusted Performance Ecosystem

Now an important part of Holley Performance, Mr. Gasket continues to expand application coverage with new products for race cars and muscle cars alike. Beyond the gaskets that made the brand famous, Mr. Gasket offers an endless variety of high-performance parts, including carburetor and fuel system components, chrome-plated accessories, fuel additives, shifter accessories, cooling-system accessories, specialty tools, and heavy-duty suspension and driveline components.

If you're navigating a carburetor swap on a classic American V8, browse the full selection of carburetor adapter plates available, or explore the complete Mr. Gasket catalog for every sealing and performance need your build demands.