Havoc Billet Nacelle-Cap Stereo for Harley-Davidson® Road King®
Factory-clean control of your music, right where it belongs.
The Havoc Handlebar Nacelle-Cap Stereo integrates the award-winning Aquatic AV GP1 Bluetooth Gauge Stereo into a precision CNC-machined billet aluminum nacelle cap, designed exclusively for Harley-Davidson Road King models from 1998–2025.
Built from 6061-T6 aircraft-grade billet aluminum, this upgrade is lightweight, incredibly strong, and engineered to live on the front of a naked touring bike in real weather and real miles. The profile follows the signature spear line of the Road King nacelle, so the whole assembly looks like it could have rolled out of the factory that way.
The Havoc nacelle-cap stereo gives you a true marine-grade head unit right on the bike, with clean visibility of the screen, and glove-friendly controls, with a cockpit that still looks like a Road King.
Key Features
Aircraft-Grade Billet Construction
CNC-machined from 6061-T6 billet aluminum and precision engineered for Road King fitment (1998-2013 and 2014-present), the nacelle cap is lightweight and strong. It's built to handle vibration, weather, and long rides without flex or fatigue.
OEM-Style Factory Look
The cap is sculpted to follow the spear down the Road King nacelle, so the stereo looks integrated—not like an afterthought. The profile, edges, and proportions are designed to match the bike's existing lines for a clean, factory-style appearance.
Integrated Aquatic AV GP1 Bluetooth Gauge Stereo
At the heart of the system is the Aquatic AV GP1 Bluetooth Gauge Stereo, using the same proven technology found in Aquatic's Harley touring model radios:
- AM/FM radio with crystal-clear reception
- Bluetooth® audio streaming, including SiriusXM or satellite radio via smartphone apps
- External USB port for music playback from USB sticks
- Bright, dimmable, easy-to-read display for visibility in all conditions
- Large, glove-friendly buttons for volume, track, and mode control
Your phone becomes the music source—tucked away safely in a pocket or bag—while the GP1 handles the actual control of your audio.
Marine-Grade Durability
The GP1 and nacelle-cap assembly are built to marine standards:
- Weather-sealed against rain and washdowns
- UV-resistant to handle sun and heat
- Protection against salt, fog, and vibration
- Designed for long-ride conditions on un-faired Harleys
Proven Audio Performance
Aquatic AV is a global leader in marine stereos and waterproof motorcycle audio systems. Pairing their GP1 gauge-style stereo with Havoc's billet nacelle cap gives Road King riders a control center that's as serious as the rest of the Havoc Roar Stereo platform.
Finish Options to Match Your Build
Available in:
- Triple Show Chrome for a bright, classic touring look
- Black for a performance-oriented style for Specials and blacked-out customs
Both finishes are designed to sit comfortably alongside Harley factory trim and typical custom upgrades.
Direct Fitment & Plug-and-Play Installation
- Uses stainless steel hardware
- Includes a model-specific harness
- Requires no cutting or splicing of factory wiring
It's built to integrate with the rest of the Havoc Roar Stereo system and Road-Lock™ amplifier brackets, so wiring, power, and control all line up the way they should.
Key Specs
| Fitment | Harley-Davidson Road King, 1998–2013 and 2014–present |
|---|---|
| Head unit | Aquatic AV GP1 Bluetooth Gauge Stereo: AM/FM, Bluetooth streaming (including SiriusXM via smartphone apps), external USB port, dimmable display, glove-friendly buttons |
| Materials | CNC-machined 6061-T6 billet aluminum nacelle cap; stainless steel hardware; marine-grade weather-sealed, UV-resistant electronics |
| Finish | Triple Show Chrome or Black |
| What's included | Billet nacelle cap with integrated Aquatic AV GP1 stereo, model-specific harness and stainless steel hardware (no cutting or splicing of factory wiring) |
Built to Be Seen, Designed to Disappear
The billet nacelle-cap stereo is meant to be admired up close—but disappear in use. You get a Road King cockpit that keeps the classic nacelle and spear line, and adds a proper marine head unit where it makes sense. The bike still looks like a Road King—only now, it sounds like your own personal stage.