Milltek exhaust system, Audi S4 4.2L (B6)

Milltek Stainless Steel Sport Exhaust System for Audi S4 4.2 V8 quattro B6 Saloon/Sedan, Avant, & Cabriolet 2003 – 2005

Audi A4 / S4 B6 exhaust system, enhancing sound and airflow.

Milltek is an exhaust manufacturer based in Derby, England, well-known among car enthusiasts. The products are made from stainless steel and are designed and manufactured in England.

All components are free-flowing, improving both the sound and engine performance by enhancing exhaust flow. When it comes to sound, Milltek often offers 2-4 different configurations to suit various preferences.

Typically, the most moderate-sounding option is the ECE-approved version with resonators, which includes one or more mid-silencers in addition to the rear muffler. Louder options are available with a straight-through center section (non-res), or in some cases, intermediate versions labeled as Road+, Sport, or similar names depending on the model.

Please note that, especially in newer model years, only ECE-approved versions are street-legal in Finland – always check the regulations applicable to your vehicle.

The different package components are mostly interchangeable, allowing users to mix and modify configurations later by purchasing individual parts such as silencers or tailpipes separately.

Audi S4 B6 Exhaust System

• Compatibility: Audi S4 4.2 V8 quattro B6 Saloon/Sedan, Avant, & Cabriolet 2003 – 2005, as well as A4 3.0 V6 B6
• Package contents: Front pipes, mid-section, and rear mufflers with tailpipes.
• ECE Approval: No

Related part numbers: SSXAU038, SSXAU873, SSXAU872, SSXAU100, SSXAU875, SSXAU874, SSXAU295, SSXAU296