The Milltek Race Catback Exhaust System gives the Audi S3 a stronger, more assertive personality, and it does so by improving the very area S3 owners most often target first: the exhaust. The factory Audi S3 Quattro exhaust is quiet and clean, tuned heavily toward refinement. Milltek designed this race-focused system as a direct replacement that sharpens the car’s attitude while improving airflow and sound quality. It turns the 8V S3 sedan and convertible into a more spirited, more responsive version of the car Audi built.
Crafted from 304L aircraft-grade stainless steel, the Milltek system withstands repeated heat cycles and harsh conditions while keeping tone consistent. The smooth mandrel-bent piping and free-flowing rear silencer deepen the note of the Audi S3 Quattro exhaust, giving the car a fuller sound even in its resonated configuration. For drivers who want maximum volume and edge, the non-resonated Race option pushes the tone into a more aggressive profile that suits spirited driving.
This Audi S3 Quattro exhaust system uses 76mm (3-inch) tubing to reduce restriction after the turbo, helping the 2.0L TFSI engine breathe more efficiently. A turbocharged platform responds quickly to exhaust improvements, and with the Milltek system installed, throttle input feels more direct, mid-range acceleration tightens up, and the car carries a more natural urgency through the rev range. The absence of factory valves also creates a more predictable tone; what the driver hears is exactly what the system delivers, without electronic sound control stepping in.
Milltek offers multiple tip options, including brushed titanium, polished, Cerakote black, and either GT or oval shapes. These choices let owners customize the visual finish of their Audi S3 Quattro exhaust upgrade as much as the acoustic character.
This system is built specifically for the 2013–2016 Audi S3 Quattro 8V sedan and convertible. It does not fit late-2016 through 2020 models, ensuring that S3 owners within this production window receive a precise, direct-fit upgrade. The kit includes the center silencer or the replacement pipe (depending on resonated or non-resonated selection), a non-valved rear silencer, four tips, and the extension pipes. Everything installs cleanly using factory mounting points, which keeps downtime short and the upgrade straightforward.
Milltek’s reputation for consistent craftsmanship is reflected across every component. With distribution in more than 90 countries and decades of focus on performance exhaust development, the brand continues pushing forward with systems that elevate sound, reliability, and driving involvement. Their approach aligns perfectly with what most S3 owners want from an Audi S3 Quattro exhaust: stronger voice, improved flow, and long-term durability.
The Milltek Race Catback Exhaust System is available now through Bulletproof Automotive. As a race-inspired Audi S3 Quattro exhaust upgrade, it brings a sharper tone, improved flow, and a more connected driving feel to the 8V sedan and convertible.
