QD X-DB Exhaust Sound Controller | Aprilia

Product Overview

Take control of your Aprilia's exhaust sound with the QD X-DB Exhaust Sound Controller, an advanced electronic exhaust valve modulation system developed for selected Aprilia Tuono V4 and RSV4 motorcycles.

Designed to integrate with the motorcycle's original electrical system, the QD X-DB retains the factory exhaust valve, servomotor and operating cables. Its dedicated electronic management interface allows riders to adjust the original exhaust valve without replacing the existing mechanical components.

The system provides five selectable valve positions, ranging from fully closed to fully open, with three intermediate settings. This allows the rider to progressively adjust exhaust sound characteristics and valve behaviour according to their preferred configuration.

Control is provided through a compact handlebar-mounted switch panel featuring two buttons. Pressing the green button opens the exhaust valve by one step, while pressing the red button closes it by one step. Holding either button for two seconds moves the valve directly to its corresponding fully open or fully closed position.

Both Aprilia applications feature a built-in ESE (Exhaust Servo Eliminator) and motorcycle-specific wiring for integration with the supported factory exhaust valve system.

Compatible Models

· Aprilia Tuono V4 Euro 5 - QD Part Number V0103825
· Aprilia RSV4 Euro 5 - QD Part Number V0103826

Key Features & Specifications

· Manufacturer: QD Exhaust
· Product: X-DB The Sound Controller
· Product Type: Electronic Exhaust Valve Modulation Kit
· Adjustment: Five Exhaust Valve Positions
· Valve Range: Fully Closed, Three Intermediate Positions and Fully Open
· Controls: Handlebar-Mounted Two-Button Switch Panel
· Green Button: Opens Valve by One Step
· Red Button: Closes Valve by One Step
· Quick Adjustment: Two-Second Hold for Full Opening or Closing
· Electronic Interface: Dedicated Management Module
· ESE: Built-in Exhaust Servo Eliminator
· Connection: Aprilia-Specific Wiring Harness
· Original Components: Factory Valve, Servomotor and Cables Retained

Why Choose the QD X-DB Sound Controller?

· Personalised Exhaust Sound: Adjust exhaust sound characteristics through progressive valve positioning.
· Greater Adjustment Flexibility: Five settings provide more control than a simple open-or-closed arrangement.
· Factory Component Integration: Works with the motorcycle's existing exhaust valve mechanism.
· Convenient Operation: Dedicated handlebar controls provide straightforward valve adjustment.
· Quick Full-Range Selection: Access fully open or fully closed positions with a two-second button hold.
· Dedicated Aprilia Applications: Motorcycle-specific configurations for supported Tuono V4 and RSV4 models.

What's Included?

· 1 x QD X-DB Electronic Management Interface
· 1 x Aprilia-Specific Wiring Harness
· 1 x Handlebar Switch Panel with Red and Green Buttons

Assembly Instructions and Warnings

· Select the correct Aprilia model before installation.
· Follow the installation instructions provided by QD Exhaust.
· Connect the electronic interface to the original exhaust valve wiring using the dedicated harness.
· Retain the original exhaust valve, servomotor and operating cables.
· Secure the handlebar switch without restricting steering movement or existing controls.
· Keep electrical wiring away from hot exhaust components and moving parts.
· Important - Road Use: This product is NOT APPROVED for road use. Fitting it invalidates the vehicle's approval. Its use is entirely the user's responsibility

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