Our inlet 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 black HDPE plastic. An integral flange (approximately 3/4" wide) makes them easy to rivet to body panels or bond to composite panels with epoxy.
This Large size has a single offset outlet nipple that accepts our 3" duct hose (sold separately). Approximately 13.7" long x 5.6" wide rectangular opening requires a lot of room, but delivers huge airflow. For best performance, the duct should be positioned so that the outlet nipple is approximately parallel to the direction of travel.
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.