Edelbrock Carburetor Adapter 2696 - Square to Spread Bore Spacer Plate

In this review the Edelbrock Carburetor Adapter 2696 is evaluated as a practical solution for installers who want to mount a square-bore Edelbrock carburetor to an OEM spread-bore intake such as a stock Quadrajet or Thermo-Quad manifold. The bottom line: this aluminum spacer plate delivers a precise fit and the intended functional gains - it adapts bolt patterns cleanly and adds 0.85 in of stack height to improve transition and idle manifold pressure without complex machining. It is best for hobbyists and restorers looking for a direct, dependable adapter rather than a custom intake modification.

Key Features

• Square-bore to spread-bore fit: Allows mounting an Edelbrock square-bore carburetor to OEM Q-Jet and Thermo-Quad manifolds without modifying the intake manifold flange.
• 0.85 in thickness: The 0.850 in spacer height provides increased intake manifold pressure at idle and helps improve throttle response through the rev range.
• Aluminum construction: Natural aluminum build keeps the adapter lightweight and resists corrosion while matching common intake hardware.
• Complete hardware kit: Ships with upper and lower gaskets, studs, nuts, screws and lock washers so installers have the parts needed for a proper seal.
• Direct replacement design: Intended as a bolt-on solution to replace stock Q-Jet or T-Q interfaces and minimize vacuum leaks when installed correctly.

Who It's For

The adapter is aimed at classic car owners, engine builders and DIY mechanics who want to fit an Edelbrock Performer square-bore carburetor to a factory spread-bore intake without costly machine work. It is especially useful when preserving the original intake while upgrading carburetion for better midrange torque and throttle response.

It is not for someone seeking a universal multi-carb conversion piece or an adapter for radically different flange types; buyers should confirm their intake is a spread-bore Q-Jet or Thermo-Quad style flange before purchasing and avoid over-tightening fasteners during installation.

Pros & Cons

Pros

• Precise fit for square-bore Edelbrock carbs to stock spread-bore manifolds, matching bolt patterns reliably.
• Supplied gaskets and hardware reduce parts sourcing and help ensure a proper seal when installed carefully.
• Aluminum 0.850 in thickness improves idle manifold pressure and overall throttle response compared with stock setup.

Cons

• Requires correct installation technique and use of studs as recommended; over-tightening can risk distortion or leaks.
• Not a universal adapter - only suitable for spread-bore Q-Jet and Thermo-Quad flange types.

Specifications

Our Verdict

The Edelbrock 2696 adapter is a sensible, well-specified spacer plate for anyone converting a stock Q-Jet or Thermo-Quad intake to accept an Edelbrock square-bore carburetor. It offers reliable fit, required gaskets and hardware, and a thickness that benefits idle and midrange response. For restorers and performance-minded DIYers who confirm fitment, it represents good value compared with custom fabrication.

Frequently Asked Questions

Will this adapter fit my intake manifold?
It fits factory spread-bore Quadrajet and Thermo-Quad type flanges; confirm your manifold uses a spread-bore flange before purchase.

Are gaskets and hardware included?
Yes; the package includes upper and lower gaskets, 4 screws, 4 studs, 4 nuts and 4 lock washers for installation.

Any installation tips?
Use the supplied studs where recommended, do not over-tighten fasteners, and check for vacuum leaks after installation to ensure a proper seal.