Product Description:

The QuickSilver Sport System with Sound Architect Valves gives your Defender V8 the sound you expected from the factory.
Loud or Quiet - our system uses our revolutionary Sound Architect Module, which is controlled by your mobile phone via the QuickSilver App. It could not be easier.
With the valves shut the QuickSilver system provides a civilised note which is unobtrusive and perfect for long journeys and early starts.
Switch to valves open and the monstrous side comes alive with volume and pitch increased to deliver a pure muscle car sound that enriches the experience.
Furthermore, in dynamic driving mode all the pops, crackles and bangs are present on the up-change & overrun, a nice touch.
The QuickSilver system is truly plug & play, it requires no intrusion into the cars's OE systems and is completely reversible (on resale?).  

• Valve control for the perfect sound.

• Stainless Steel mandrel bent tubing.

• Improved throttle response.

• Fantastic burbles, crackles and pops on the overrun.

• Civilised to Muscle car in an instant.

• The 4 x straight carbon fibre tail pipes are a huge improvement to the rear view.