Edelbrock Four‑Hole Square‑Bore to Spread‑Bore Carburetor Adapter — Natural Aluminum One Size 0.850"

The Edelbrock 2696 adapter converts a four‑hole square‑bore carburetor to fit spread‑bore (Quadra‑jet/Thermo‑Quad) intake manifolds, using a durable 0.850" thick aluminum plate with included gaskets and hardware.

Swapping carburetors or fitting a preferred Edelbrock square‑bore unit to a factory spread‑bore manifold can be costly and time consuming if you need new intake components. The 2696 adapter provides a straightforward mechanical interface so you can mount an Edelbrock four‑hole square‑bore carburetor to stock Quadra‑jet and Thermo‑Quad manifolds without modifying the intake. Built from machined aluminum with a natural finish, this adapter restores correct alignment and porting while keeping installation relatively simple.

How does this adapter let me use a square‑bore carburetor on a spread‑bore manifold?

The adapter physically bridges the mismatch between the four small, closely spaced square‑bore ports and the wider spread‑bore openings. It locates each individual venturi over the matching intake runner and seals with included gaskets to prevent leaks. You retain the original intake and gain compatibility with a wider range of carburetors.

• Precision machined openings to align square‑bore venturis with spread‑bore runners.
• 0.850" thickness for appropriate stack height and flow tuning.
• Individual venturi ports maintain consistent airflow to each cylinder.
• Includes gaskets and mounting hardware for a complete installation.

What materials and finishes does the Edelbrock 2696 use?

The adapter is made from aluminum for a balance of light weight and resistance to corrosion, and it carries a natural machined finish that resists flaking or peeling. Aluminum also machines flat and true, which helps ensure a reliable seal against both the carburetor and the intake manifold surfaces.

• High‑quality aluminum construction for durability and weight savings.
• Natural finish that requires no additional coatings to function.
• Flat, machined flanges to improve gasket sealing and reduce air leaks.

How easy is installation and what’s included?

Installation is designed for a typical enthusiast with basic mechanical skills and common tools; the adapter replaces the factory unit without cutting or welding. Edelbrock supplies necessary gaskets and mounting hardware to simplify the process and help avoid extra parts hunting before you start.

• Comes with gaskets and mounting bolts required for standard installation.
• Vehicle‑specific fit design to match manifold bolt patterns and clearances.
• No modification to the intake or carburetor is normally necessary.

Will this affect engine performance or tuning?

The adapter preserves the intended airflow paths when properly installed, but any change in carburetor or stack height can alter fueling and air velocity slightly. Expect to check and tune idle mixture and possibly rejet the carburetor after installation to optimize throttle response and drivability.

• Maintains individual venturi flow to each intake runner for balanced distribution.
• Stack height (0.850") can influence throttle response and tuning needs.
• Plan to verify fuel metering and make minor adjustments after fitting.

Who is this for? The Edelbrock 2696 adapter is aimed at car enthusiasts, restorers, and hot‑rodders who want to run an Edelbrock four‑hole square‑bore carburetor on a vehicle equipped with stock Quadra‑jet or Thermo‑Quad intake manifolds. It’s ideal if you want to upgrade carburetion without buying a new intake or fabricating custom parts, and for anyone seeking a clean, bolt‑on solution backed by a reputable performance brand.