liriuda Edelbrock square-bore to spread-bore carburetor adapter 0.85" aluminum spacer kit with gaskets & hardware

Convert a spread-bore Q-jet or Thermo-Quad intake to accept an Edelbrock square-bore carburetor with a durable 0.850" aluminum adapter kit.

If your classic or updated engine has a factory spread-bore intake but you want the flow characteristics or availability of a square-bore Edelbrock carburetor, the Edelbrock 2696 adapter provides a precise mechanical solution. Machined from natural-finish aluminum, this 0.850-inch spacer plate aligns individual venturi ports and comes with gaskets, studs, bolts, nuts and lock washers so you can mount a square-bore base to a spread-bore flange without custom fabrication.

How does this adapter let a square-bore carburetor fit a spread-bore manifold?

The Edelbrock 2696 is a port-matched spacer that converts the square-bore carburetor base flange to the spread-bore footprint used by many stock Quadrajet and Thermo-Quad intakes. It keeps each venturi aligned so the carburetor and manifold flow paths remain consistent.

• 0.850" thick machined aluminum plate for stable carb/manifold spacing
• Individual ports that match square-bore venturis to spread-bore flanges
• Includes upper and lower gaskets to prevent vacuum leaks
• Hardware kit with studs, bolts, nuts and lock washers for a complete install

Will this kit work with my Q-jet or Thermo-Quad intake?

The adapter is specifically shaped to accept Edelbrock square-bore carburetors while bolting to OEM-style spread-bore intake manifolds such as Quadrajet (Q-jet) and Thermo-Quad. Verify your flange pattern matches a factory spread-bore before ordering.

• Designed for spread-bore intake flanges used on many GM applications
• Works with Edelbrock square-bore Performer-style carburetors
• Measure flange bolt pattern and port spacing if in doubt
• OEM part number 2696 identifies the correct adapter geometry

What hardware and gaskets are included, and how should I install them?

The kit ships with both gaskets and all necessary fasteners to mount the adapter between carburetor and intake. Use the supplied studs for the carb-to-adapter connection and the fillister head bolts for adapter-to-intake; tighten to proper torque and avoid overtightening to prevent warping or leaks.

• Includes 1 adapter plate, 1 square-bore gasket, 1 spread-bore gasket
• Four 5/16" x 1-1/2" studs, four 5/16"-24 nuts, four lock washers
• Four 5/16" x 3/4" fillister bolts to secure adapter to intake
• Follow torque specs and use recommended thread locking methods sparingly

What performance or drivability changes can I expect?

As a mechanical interface, the adapter primarily enables component compatibility. Properly matched carb and manifold can improve throttle response and overall airflow compared with mismatched or poorly sealed transitions. Any performance gains depend on carb calibration, intake condition and overall engine tuning.

• Better manifold sealing at idle due to correct port alignment
• Potential for improved mid-range response when combined with appropriate carb tuning
• No guaranteed horsepower increase—results depend on system setup
• Useful for restoring or upgrading classic engines to available square-bore carbs

Who is this for: The Edelbrock 2696 adapter is aimed at mechanics, restorers and enthusiasts who want to install an Edelbrock square-bore carburetor on vehicles originally equipped with Quadrajet or Thermo-Quad spread-bore intake manifolds. It suits people restoring classic GM and similar engines, shops performing carb swaps, or anyone replacing aging spread-bore carbs with modern square-bore units and who needs a reliable, bolt-on interface without custom machining.