Remus Exhaust UK: The Revolutionary App Control System | Sound at Your Fingertips
Imagine cruising through your quiet neighbourhood in stealth mode, then—with a few taps on your smartphone—transforming your car into a thunderous beast for an open-road blast, all without touching a single physical switch.
Here’s something that sounds like science fiction but is very real: Remus has developed an app that lets you control your exhaust valves with the precision of a studio sound engineer . No more fumbling for remote controls or installing clunky manual switches. The REMUS Sound Control app connects to your car via Bluetooth, allowing you to adjust valve positions in 10% increments across the entire rev range . It’s the most sophisticated exhaust control system available to UK enthusiasts, and it’s completely free to download .
TL;DR;
The REMUS Sound Control app revolutionises how you interact with your exhaust by replacing physical remotes with smartphone control . It connects via Bluetooth to a Sound Controller module (installed with your valve-controlled Remus exhaust) and offers two modes: Manual (four preset valve positions you define) and Automatic (divides your engine’s RPM range into three segments with custom valve openings per segment) . The system requires an OBD2 connection for RPM data and works with both iOS and Android devices . A crucial UK consideration: the Sound Controller module (STE 0002BT) carries NO EC approval and is intended for off-road use only . The app itself is rated 4.0 stars but has limited reviews, reflecting its niche enthusiast audience .
Key Takeaways
- Two Control Modes: Manual mode offers four programmable valve positions; Automatic mode splits your RPM range into three customisable zones with independent valve settings
- 10% Precision: Adjust valve opening in exact 10% increments from fully closed to 100% open
- Bluetooth Connectivity: Direct communication between your smartphone and the Remus Sound Control electronics
- OBD2 Required: The system taps into your car’s OBD2 port for real-time RPM data—check your vehicle’s OBD2 location before purchasing
- Memory Function: The valve always returns to the last chosen position when you restart your car
- UK Legal Warning: The Sound Controller module has NO EC approval—road legality is your responsibility
- Free App: The REMUS Sound Control app is completely free on iOS App Store
What Is the REMUS Sound Control App?
Have you ever wished you could fine-tune your exhaust note the way you adjust your seat position? That’s exactly what Remus has created.
The REMUS Sound Control app is a free smartphone application that allows you to individually adjust the valve response when using a valve-controlled Remus sports exhaust system . Instead of being limited to “loud” and “quiet” modes, you get granular control over exactly how your exhaust behaves.
How It Works
The system comprises two components:
- The Sound Controller hardware (SKU: STE 0002BT) – an electronic module that includes an OBD2 plug, a remote control button, and an electrical actuator with cables . This costs approximately $966 AUD (around £500-600, though UK pricing varies).
- The free Sound Control app – available for both iOS and Android devices .
Communication between your smartphone and the Sound Control electronics happens via Bluetooth . After installation, you perform a basic calibration that takes into account your engine’s maximum RPM, and then you’re ready to program your exhaust signature .
“The REMUS Sound Control app allows the response of the valve to be adjusted individually when using a valve controlled REMUS sports exhaust system.” — Remus official description
Two Ways to Control Your Sound
Remus gives you two distinct operating modes, each offering different levels of control.
Manual Mode: Four Buttons, Unlimited Possibilities
In Manual mode, you can define four different valve positions, each accessible via a dedicated button in the app .
What you can do:
- Program each button with a specific valve opening percentage (0% = fully closed, 100% = fully open)
- Adjust in precise 10% increments
- Switch between modes instantly while driving
- Create a “stealth” button, a “sport” button, a “track” button, and whatever else you desire
The beauty of Manual mode is its simplicity. Regardless of engine speed, you decide exactly how your exhaust sounds at any moment .
Automatic Mode: Set and Forget
Automatic mode takes customisation to another level entirely. Here, you divide your engine’s entire RPM range into three separate segments .
The process:
- Choose the lower and upper limits for each RPM segment
- Set the valve opening percentage for each segment (again in 10% increments)
- The system automatically controls valve position as you drive through those RPM ranges
This means you could have:
- Valves closed below 2,500 RPM for quiet city driving
- 50% open from 2,500-4,500 RPM for a sporty note
- 100% open above 4,500 RPM for full-throttle racing sound
Once configured, Automatic mode requires no further intervention—the exhaust responds intelligently to your driving without you touching the app .
Chart: REMUS Sound Control Operating Modes
This chart visualises how both control modes work across the RPM range.
What You Need to Make It Work
Compatible Vehicles
The Sound Controller system is compatible with specific vehicle applications. Remus Australia lists these examples:
| Vehicle | Model | Power | Years |
|---|---|---|---|
| Mercedes CLA | C117 2.0L, CLA 45 AMG | 265kW | 2014+ |
| Mercedes CLA | C117 2.0L, CLA 45 AMG Facelift | 280kW | 2015+ |
| Mercedes A-Class | W176 2.0L, A 45 AMG | 265kW | 2013+ |
| Mercedes A-Class | W176 2.0L, A 45 AMG Facelift | 280kW | 2015+ |
For other vehicles, consult your Remus dealer to verify compatibility.
Installation Requirements
- OBD2 Connection: The Sound Controller plugs into your vehicle’s OBD2 port . Check your car’s manual to locate this port—it’s usually under the dashboard on the driver’s side.
- Proper Installation: “For trouble-free usage of the REMUS Sound Controller App, connect the OBD2 plug and install the sound controller properly!” . If unsure, contact a specialist workshop.
- Bluetooth Button Conflict: Important note—”The REMUS Sound Control App will not function when the bluetooth button is connected!” . You can’t use both simultaneously.
- Multiple Vehicle Pairing: The app can pair with multiple vehicles and Sound Controllers, but not at the same time .
The Memory Function
Once you’ve set your preferences, the system remembers. “Note that the valve is always in the last chosen position when your car is started” . This means if you left it in “loud mode” when you parked, it’ll be loud when you start up—something to consider for early morning departures.
Real-World Usage: What Owners Should Know
App Performance
The REMUS Sound Control app has a modest rating of 4.0 out of 5 stars based on limited reviews . With only two total reviews recorded on some platforms, it’s clear this is a niche product for dedicated enthusiasts rather than a mass-market application.
Practical Tips
Calibration is essential: After installation, you must perform a basic calibration that accounts for your engine’s maximum speed . This ensures the Automatic mode works correctly.
Experiment with settings: The beauty of 10% increments is the ability to fine-tune. Start with conservative settings and gradually adjust until you find your perfect sound profile.
Create presets for different scenarios:
- Early morning departure: valves closed
- Weekend fun: 50-75% open
- Track day: 100% open
Known Limitations
- The app hasn’t been updated recently (last update recorded May 27, 2021)
- iOS 8.0 or later required—most modern devices are fine
- Only English and German language support
- 35MB download size
Comparison: Sound Control vs Traditional Valve Systems
| Feature | REMUS Sound Control | Traditional Remote | Factory Valve System |
|---|---|---|---|
| Control Method | Smartphone app (Bluetooth) | Physical keyfob | ECU-determined |
| Valve Positions | 10% increments, 0-100% | Usually open/closed only | Limited to 2-3 modes |
| RPM Programming | 3 customisable zones | None | Factory preset only |
| Preset Buttons | 4 user-programmable | Usually 1-2 | Mode-dependent |
| Memory Function | Last position retained | Varies | Varies |
| Installation Complexity | Requires OBD2 connection | Simple wiring | Factory-fitted |
| UK Road Legality | Depends on exhaust system | Depends on exhaust | Factory legal |
The Critical UK Legal Reality
This section matters enormously for UK buyers.
NO EC Approval
The REMUS Sound Controller (SKU: STE 0002BT) is explicitly marked “NO (EC-) APPROVAL” . The product page includes a clear warning:
“ATTENTION: NO (EC-) APPROVAL!”
What This Means for UK Roads
Remus’s legal disclaimer states:
“The buyer shall be solely responsible for obtaining all whatsoever approvals and permissions required by the respective national law for suchlike products and shall be solely responsible for ensuring that the products manufactured by REMUS comply with the approvals required for the respective usage in the country of destination.”
In plain English:
- It’s your responsibility to ensure the system is legal for UK roads
- EC-approved components are required for road legality
- Without approval, the system is intended for off-road use only
Intended Use in Austria
The manufacturer clarifies: “Products manufactured by REMUS without (EC-)approval are only eligible for usage at motor sport events or tests within the meaning of KFG 1967. They are not intended for vehicles used on public roads” .
UK Application
This means:
- If you use the Sound Controller on UK public roads, you’re taking a legal risk
- MOT testers may fail vehicles with non-approved modifications
- Insurance declarations become critical—non-disclosure could void coverage
- Track day use is perfectly acceptable
The Exhaust System Connection
The Sound Controller’s legality also depends on your exhaust system. If your Remus exhaust has EC approval with valves closed, but the Sound Controller allows valve opening on public roads, you may be operating outside your system’s approval.
FAQ Section
1. Is the REMUS Sound Control app really free?
Yes, the app is completely free to download from the iOS App Store and Android platforms . However, you need the Sound Controller hardware (STE 0002BT) which costs approximately £500-600 depending on supplier .
2. What vehicles are compatible with the Sound Control system?
Remus lists specific Mercedes A45 and CLA45 applications . For other vehicles, contact your Remus dealer to verify compatibility. The system requires a valve-controlled Remus exhaust and OBD2 connectivity.
3. Can I use the app without the hardware?
No. The app is useless without the Sound Controller module installed in your vehicle. The app provides the interface, but the hardware controls the exhaust valves .
4. Is the Sound Control system legal on UK roads?
The Sound Controller module carries NO EC approval, meaning it’s officially intended for off-road/motorsport use . Road legality depends on your specific setup and how you use it. Consult with your Remus UK dealer for guidance.
5. What happens if I lose my phone?
The system remembers the last valve position . Your car will continue to operate with that setting. You can download the app on a new phone and re-pair with the Sound Controller.
6. Can I still use a physical remote?
The Sound Controller includes a remote control button , but you cannot use both the Bluetooth button and the app simultaneously . Choose your preferred control method.
7. Does the app drain my phone battery?
Bluetooth LE (Low Energy) technology minimises battery impact. The app only communicates when you’re actively adjusting settings—it doesn’t run constantly in the background.
8. Will the Sound Controller void my vehicle warranty?
This depends on your vehicle manufacturer and warranty terms. Any modification to the exhaust system or electrical system potentially affects warranty coverage. Consult your dealer.
9. How do I install the Sound Controller?
Professional installation is strongly recommended. The system requires connecting to your OBD2 port and integrating with your exhaust valves . A specialist workshop familiar with Remus products is ideal.
10. Can I share my sound profiles with other REMUS owners?
The app doesn’t currently include profile-sharing functionality, but you can manually program the same settings on multiple devices.
References
- REMUS Performance Sport Exhausts – Official Website
- REMUS Sound Control – Apple App Store
- Remus Australia – Sound Control App Information
- Remus Australia – Sound Controller Product Page
- Remus UK – Official UK Distributor
Have you experienced the REMUS Sound Control app? What vehicle do you drive, and how has smartphone valve control transformed your driving experience? Drop a comment below and share your setup—the good, the bad, and the Bluetooth pairing stories!
