Armytrix Audi S5 B8 4.2 V8 FSI Coupe (2007-2012) Valvetronic Exhaust

Unlock the deep, unmistakable V8 growl of your Audi S5 B8 Coupé with the Armytrix Valvetronic Exhaust System—a performance-focused upgrade engineered for the naturally aspirated 4.2L V8 FSI engine. Built to deliver enhanced flow, bold sound, and full driver-controlled versatility, this premium system transforms your S5 into a true performance machine.

Featuring dual 2.5” mandrel-bent stainless steel main pipes, the Armytrix system improves exhaust velocity and throttle response while delivering a race-inspired tone. With the included wireless remote and smartphone app integration, you have instant control over the valvetronic system—whether you’re driving discreetly or making your presence known.

Key Features:

• Designed for Audi S5 B8 Coupé 4.2L V8 FSI (2007–2012)

• Main pipe diameter: 2 x 2.5” – optimized for power and exhaust tone

• Valvetronic system – switch between quiet and aggressive modes in seconds

• App & remote controlled (iOS & Android compatible)

• Direct bolt-on fitment – no cutting or welding required

• Armytrix OBDII plug-n-play module – speeds up installation by 30%

• Fault-clearing technology – reduces risk of CEL from cat or OPF mods

• LHD and RHD compatible – supports global vehicle configurations

Fitment Restrictions:

• Does NOT fit Audi S4 B8 models with factory sport differential

• Use VIN to confirm exact model compatibility before ordering

Wireless Valve Control via OBDII Module:

Armytrix OBDII Control Module is REQUIRED

Install the module via the vehicle’s OBDII port for seamless control of the exhaust valve system. Modes include:

• ON – Valves open for full performance and sound

• OFF – Valves closed for a refined, quieter ride

• AUTO – Adaptive mode based on RPM and throttle position

Control the system from your included key fob or the Armytrix smartphone app.

Exclusive Check Engine Light Prevention System:

This system features Armytrix’s proprietary catalytic converter & OPF fault-clearing mechanism, engineered to minimise the likelihood of Check Engine Lights when paired with upgraded or de-catted components—ideal for performance-tuned vehicles.

Fitment:

• Vehicle: Audi S5 B8 Coupé

• Engine: 4.2L V8 FSI

• Years: 2007–2012

• Drive Config: Compatible with both LHD and RHD

• Note: Not compatible with S4 B8 sport differential models