NACA DUCT 4 in.NACA DUCT 4 in.Example of installationExample of installation
Quantity Your Price
1 $67.99



Hand Laid Fiberglass

4 in. Wide
9 in. Long
1 in. Inlet Depth

Made in the USA

Keep your cool with NACA Ducts

Similar to an airplane, drag is undesirable for a race car. Every bit of drag on an airplane, a rocket or a race car; limits the maximum speed and increases the amount of fuel consumed.

Developed with optimum performance in mind, the unique shape of the NACA duct effectively transfers air in, or out where needed with minimal drag.

Benefits include:

  • Low drag
  • Introducing fresh air
  • Extracting undesirable heat
  • Balancing air pressure

Pro-werks NACA ducts are lightweight, hand laid fiberglass construction, and provide a positive low resistance method of air transfer. The mounting flange measures approximately 1" wide, and is easily installed with either bonding compound, rivets or small screws - on fiberglass, aluminum, or steel body panels.

Depending on which direction that they are mounted, NACA ducts effectively provide an intake for fresh air where needed, or remove it. These specialized components will help your project come together with great style and increased performance.

Install multiples for increased volume:

There are three sizes of Pro-werks NACA ducts to choose from, if the available space or panel shape dictates it, they may be mounted individually or in multiples (side by side) for additional airflow volume.

Proudly Made in the USA

What's NACA mean?   The NACA acronym stands for National Advisory Committee for Aeronautics. NACA was the predecessor of NASA (the National Aeronautics and Space Administration).


Which direction do I mount a NACA duct?


Depending on which direction they are mounted,
NACA ducts provide effective air intake or removal.


How do I mount a NACA duct?


Based on the material the NACA duct is being mounted to,
you can attach by bonding with adhesive, riveting, or using
small machine type bolts with nuts.


Which size NACA duct do I need?


NACA ducts are available in three widths: 3 inch, 4 inch and 7 inch. Smaller NACA ducts provide less air flow than larger NACA ducts.

NACA Duct: C42-017
Inlet Length 9.0 in.
Overall Length 10.0 in.
Inlet Width 4.0 in.
Inlet Depth 1.0 in.
Overall Width 6.0 in.