Milltek Sport Audi S3 8V Sportback Non-Resonated Cat/GPF-Back Exhaust System

Milltek Sport Audi S3 8V Sportback Non-Resonated Cat/GPF-Back Exhaust System

The Milltek Sport exhaust system for the Audi S3 8V Sportback is designed to enhance performance and sound while providing a cleaner look. This non-resonated cat/GPF-back system replaces the original exhaust from the gas particulate filter (GPF) back, allowing for improved gas flow and a sportier sound.

What this Exhaust System Does

This exhaust system features optimized pipework and performance silencers, which help to reduce backpressure. Backpressure is the resistance that exhaust gases face as they exit the engine, and minimising it allows the engine to perform better. With this system, you can expect:

• A richer, sportier exhaust note without excessive noise
• A more responsive feel when accelerating, particularly under load or on the motorway
• An enhanced rear appearance for a sportier look
• Resistance to corrosion, thanks to high-quality stainless steel construction

While power gains from this exhaust may be modest, the improvements in sound, throttle response, and aesthetics are significant, especially when paired with other modifications like an ECU remap or upgraded intake.

Sound and Everyday Driving

Milltek has designed this system to provide a balanced tone suitable for daily driving. Compared to the factory exhaust, you will notice:

• A more pronounced, deeper sound at idle and low revs
• A clearer tone under acceleration
• Controlled sound levels during highway cruising, reducing cabin drone

This makes it a suitable choice for both daily commutes and spirited drives.

Construction and Materials

This exhaust is crafted from T304L stainless steel, known for its durability and resistance to rust and heat. The smooth, mandrel-bent pipework ensures consistent internal diameters, promoting effortless gas flow. It is designed as a direct replacement that utilises factory-style mounting points, ensuring proper alignment and security during operation.

Tailpipe Options

Choose the tailpipe finish that complements your style:

• Quad Polished Ovals
• Quad Cerakote Black Ovals
• Quad Polished GT-100
• Quad Cerakote Black GT-100
• Quad Titanium GT-100

All options maintain the same fit and sound, so your choice is purely cosmetic.

Fitment and Compatibility

This exhaust system is specifically designed for:

• Audi S3 8V Sportback models

For precise fitment details, please use the vehicle lookup tool on the site or check the “Vehicle Fitment” tab. Professional installation is recommended to ensure proper alignment and sealing, helping to maximise sound quality and reliability.