4" Velocity Stack for 2 Barrel Carburetors & EFI | Stromberg 97, Holley 94, Rochester 2GC

4" Velocity Stack for 2-Barrel Carburetors & EFI

Add classic hot rod styling and improved airflow to your induction system with this 4-inch velocity stack. Designed for 2-barrel carburetors and compatible EFI throttle bodies, this stack delivers both performance and vintage aesthetics.

The smooth trumpet entry helps streamline airflow into your carburetor or throttle body, reducing turbulence and improving air velocity. Whether you're running a traditional Stromberg setup or a modern EFI conversion, this velocity stack finishes the top of your engine the right way.

Ideal for single-carb and multi-carb applications on hot rods, flatheads, vintage V8 builds, and nostalgic drag cars.

Fitment

Fits most 2-barrel carburetors and throttle bodies with a 2-5/8" diameter top flange, including:

• Stromberg 48
• Stromberg 81
• Stromberg 97
• Holley 94
• Rochester 2GC (small base)

Also compatible with many EFI throttle body conversions using the same flange diameter.

Key Features

• Smooth trumpet entry for improved airflow
• Classic 1960s-inspired hot rod styling
• 4" overall height (can be shortened for custom applications)
• Accepts 2-5/8" disc air filter
• Mounts securely using four stainless 10-24 set screws (included)
• Shot-peened matte finish (polishing optional)
• 356 heat-treated sand-cast aluminum (not die-cast)
  

Dimensions

• Height: 4" (can be shortened)
• Diameter: 4-1/2" (top)
• Base diameter: 3-1/16"
• Weight: 1 lb

What’s Included

• (1) 4" velocity stack
• (4) Stainless 10-24 set screws

Sold individually.

Optional Finish

• • Polishing available (additional time required for polishing)

Manufactured in the USA

This 2-barrel velocity stack is perfect for traditional hot rods, vintage race cars, and custom EFI builds. Whether you're running Stromberg 97s on a flathead or dual Holley 94s on a small block Chevy, this stack enhances airflow while delivering a timeless performance look.

Frequently Asked Questions

Will this fit a Stromberg 97?
Yes, this velocity stack fits Stromberg 48, 81, and 97 carburetors with a 2-5/8" top flange.

Does this work with EFI throttle bodies?
Yes, as long as the throttle body uses a 2-5/8" diameter top flange.

Can this be used in multi-carb setups?
Absolutely. These are sold individually and are ideal for dual, triple, quadruple or any other multi-carb applications.