Abstract: A modular port turning kit for tuning a speaker enclosure. Two flared sections, a straight section, and a pair of cylindrical connectors are included in a kit. The straight section is cut to length to configure the port to have an enclosed volume of a size needed to tune a particular speaker enclosure. The straight section has a wall thickness and profile size which forms a butt junction with the junction end of the flared section. The connectors fit over the cylindrical peripheries to provide an interference fit when the sections are joined. The sections are all of thermoplastic material to provide sufficient rigidity. After testing, adhesive can be used to secure the butt junctions to form a permanent installation.