Our NACA ducts were designed using computer-aided analysis and wind tunnel testing for maximum air flow with minimal drag. They are molded from tough, high-impact plastic. An integral flange (approximately 3/4" wide) makes them easy to rivet to body panels or bond to composite panels with epoxy.
This Small size has an outlet nipple that accepts our 2.5" duct hose (sold separately). Approximately 7" long x 3.7" wide opening is perfect for limited space applications such as motorcycles or Miata vent windows. Choose Clear or paintable Black plastic.
Note: These ducts are designed and built for racing use. They are not built for show cars. You can sand and paint them, but do not expect a "show-quality" finish out of the box.