2016 Indian Roadmaster Stereo System Upgrade The small Arc Audio amplifier left plenty of room in the trunk. The underside of the trunk was a convenient spot to terminate the plugs for the audio wiring. Paint protection film was applied under the wiring to protect the paint. The front speakers were upgraded with Arc Audio 5.25″ coaxials, which happened to be a perfect fit. The rear speakers were upgraded with the Arc Audio coaxials. With the rear grilles in place, the bike looks completely stock. The front of the bike looks stock but sounds much better!
