Armytrix Audi A6 C8 55 TFSI (2018-present) valvetronic exhaust system

Unleash pure performance and sound from your Audi A6 C8 55 TFSI Avant (2018–Present) with the Armytrix Valvetronic Exhaust System—an intelligent, high-performance upgrade engineered exclusively for Non-OPF models. Built for the driver who demands more, this system enhances exhaust tone, flow, and responsiveness with uncompromising precision and control.

Featuring dual 2.5” mandrel-bent main pipes and finished with bold quad 4” tips, this Cat-Back system produces a deep, resonant tone and transforms your rear aesthetic with motorsport-inspired aggression. With Armytrix’s plug-n-play OBDII module, installation is quick, clean, and fully integrated into your driving experience.

Key Features:

• Designed for Audi A6 C8 Avant (55 TFSI, 3.0TFSI V6, Non-OPF, 2018–Present)

• 2 x 2.5” Mandrel-Bent Main Pipes – Optimized for high-flow performance and rich acoustic delivery

• Quad 4” Tips – Bold, aggressive styling with premium finish and powerful sound output

• Valvetronic Exhaust System – Electronic valve control allows you to tailor sound and volume at will

• Wireless Remote & Mobile App Control – Adjust valves instantly via remote or Armytrix app (iOS/Android)

• Plug-n-Play OBDII Control Module – Reduces installation time by up to 30% versus traditional setups

• Direct Bolt-On Installation – No cutting or welding required

• Built-in CEL Prevention – Exclusive fault-clearing logic for catalytic converter & OPF-related codes

• LHD & RHD Compatible – Global fitment for all market variants

Fitment Overview:

• Model: Audi A6 (C8)

• Body Style: Avant

• Engine: 55 TFSI – 3.0TFSI V6

• Years: 2018–Present

• Emission Type: Non-OPF

• Drive Orientation: Left-Hand Drive (LHD) & Right-Hand Drive (RHD)

Important Fitment Notes:

• Quad-tip muffler setup is only compatible with the Audi S7 rear diffuser on S-Line rear bumpers

• Please confirm compatibility using your VIN before installation

• Armytrix OBDII Control Module is required for full system functionality and smart valve control

Wireless Valve Control via Armytrix OBDII Module:

Adjust your exhaust character on-the-fly with Armytrix’s smart valve control system:

• ON – Valves open for maximum flow and an exhilarating, full-bodied exhaust note

• OFF – Valves closed for a more discreet and refined sound profile

• AUTO – Valves adjust automatically based on engine load and RPM for dynamic performance

CEL Prevention Built In:

Equipped with advanced catalytic converter and OPF-related fault-clearing logic, this system is designed to reduce the risk of triggering Check Engine Lights—even on tuned vehicles with aggressive setups.

Performance. Presence. Precision.

The Armytrix Valvetronic Exhaust System for the Audi A6 C8 Avant 55 TFSI delivers the power, control, and sonic experience your factory system simply can’t. Transform your driving dynamics—without compromise.