The Road King Add-On Kit is a Harley-Davidson audio expansion system designed to enhance existing motorcycle speaker setups without requiring a full system replacement. This modular kit integrates directly with compatible amplifier systems to extend overall audio performance.
 
Built as a plug-and-play Harley Road King audio upgrade kit, it allows riders to expand their current motorcycle audio system using factory-style mounting and marine-grade components.
This system is intended for users who already have an installed amplifier configuration.
 
As a Harley-Davidson audio upgrade kit focused on expansion rather than replacement, it provides a flexible path for improving sound output while maintaining existing system architecture.
 
The Road King Add-On Kit is a modular motorcycle audio expansion designed to integrate with existing Rockford Fosgate Road King lid audio systems. This kit is intended for riders who already have a compatible amplifier setup and want to expand their existing audio system without replacing their full configuration.
 
Built for plug-and-play compatibility, the kit includes marine-grade speakers, mounting brackets, a Plex shell, and pre-configured wiring designed to connect directly to an existing amplifier system. This allows riders to expand their audio performance while maintaining factory-style fitment and clean installation.
 
Ideal for Harley-Davidson Road King owners upgrading step-by-step, this add-on kit provides a flexible path to improved sound performance without the need for a full system replacement.
 
This kit is designed to work with your pre-existing Rockford Fosgate Road King Lid Kit.
This kit comes with Marine grade speakers (TMS5), a Plex shell with no power button, the brackets and hardware, plus long enough speaker wire to connect to your Lid Kit amp. This system is sold with no amplifier or bluetooth receiver as it is an add-on kit to the Rockford Fosgate Road King Lid Kit.