BMW M140i - Sport Exhaust with Sound Architect™ (2016 on) - QuickSilver Exhausts

BMW M140i - Sport Exhaust with Sound Architect™ (2016 on)




Above video is a Petrol Particulate Filter car. 


Electronic Valves inc. Sound Architect™ Module - uses QS APP (Android and iOS)

Our Sound Architect App hands control of the valves back to the driver for the ultimate experience. When you select ‘Open’ they’ll stay open and when you select ‘Closed’ they’ll stay closed – this choice will be remembered even after the car’s been turned off and on.

The electronic module included only requires a 12v feed, usually a cigarette-lighter socket. It’s Bluetooth controlled on the driver’s smart device, and pairing takes just a minute.

The electronics are designed in-house and manufactured for us here in the UK, using local British factories.


A lighter weight system that has more efficient flow and shows a noticeable improvement in throttle response whilst enhancing that sports car sound.

The system uses active valve technology allowing the driver to switch from Stealth to Sport using the Sound Architect by QuickSilver.



• Wonderful deep muscle rich sound  with pops and burbles in Sport mode.

• Retains a civilised 'under the radar' note in Stealth mode.

• Stainless Steel mandrel bent tubing.

• Improved throttle response.

• Retains original tips to keep the look.

• Carbon QuickSilver Tips to define the look.



Revs Idle 1000 2000 3000 4000 5000 6000 7000 Blip
OEM 62 62 64 66 70 76 82 89 91
QS - Stealth 73 76 70 76 82 87 90 92 92
QS - Sport 78 80 74 80 87 91 95 96 107



OEM 21 kg - 46 lbs
QS 17.3 kg - 38 lbs
Saving 7 kg - 15 lbs

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