Milltek Filter Back Exhaust Audi S3 2.0TFSI Quattro Saloon 8Y OPF/GPF 20+

Milltek Filter-back Exhaust for Audi S3 2.0TFSI Quattro Saloon/Sedan 310PS & 333PS 8Y (OPF/GPF Models Only) (2020 onwards) – Sharper Sound, Filter Retained

This is Milltek's particulate filter-back system for the Audi S3 2.0TFSI Quattro Saloon/Sedan 310PS & 333PS 8Y (OPF/GPF Models Only). It replaces everything downstream of the factory diesel or petrol particulate filter with wider-bore pipework and re-tuned silencers, cutting back pressure and sharpening the exhaust note. The filter itself is left exactly where the manufacturer fitted it, so emissions equipment is unaffected. It's offered in non-resonated, resonated EC approved or race non-resonated versions and 8 tailpipe finishes, so you can pick the setup that suits how the car's used.

It's the right choice if you want a sportier sound and a genuine, if modest, flow improvement on a filter-equipped car, without going anywhere near the parts of the system that keep it emissions-compliant.

Specifications

• System Type: Particulate Filter-back
• Pipe Diameter: 80mm (3.15")
• Race System: No
• Fitting Time: approx. 1.5 to 2 hours (Milltek figure)

Key Features

• Made from T304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration
• Mandrel-bent pipework keeps a constant diameter through every bend for unrestricted flow
• 80mm (3.15") pipework
• Fits behind the factory particulate filter, which stays in place
• Choice of 8 tailpipe finishes: GT-115 Burnt Titanium, JET-115 Carbon Fibre, Cerakote Black Oval, GT-115 Cerakote Black, Polished Oval, GT-115 Polished, GT-115 Titanium, GT-115 Brushed Titanium
• EC approved versions available
• Resonated (quieter) or non-resonated (louder) versions
• Designed, developed and manufactured in the UK by Milltek Sport

Fitment

• Audi S3 2.0TFSI Quattro Saloon/Sedan 310PS & 333PS 8Y (OPF/GPF Models Only) (2020 onwards)
• Audi S3 2.0TFSI Quattro Saloon/Sedan 310PS 8Y (North American/Non-OPF Models Only) (2022 onwards)

Not every version fits every car in this list. Check the fitment shown for the option you select.

Not suitable for: the Audi S3 2.0TFSI Quattro Sportback 310PS & 333PS 8Y (OPF/GPF Models Only), which needs the Milltek Filter-back Exhaust Audi S3 2.0TFSI Quattro Sportback 8Y OPF/GPF 20+.

Installation

Milltek quotes a fitting time of approx. 1.5 to 2 hours. We recommend professional fitting on a ramp. Once fitted, check the tailpipe alignment and re-check all clamps after the first few hundred miles.

Upgrade Further

Also available from Milltek for this car: Milltek Downpipe & De-cat Audi S3 2.0TFSI Quattro Saloon 310PS & 333PS 8Y OPF/GPF 20+.

What's the difference between the resonated and non-resonated versions?

The resonated version adds extra silencing for a quieter, more refined tone. The non-resonated version leaves it out, so it is louder and more aggressive. Race versions are the loudest and are intended for track use.

Which tailpipe finishes are available?

You can choose from: GT-115 Burnt Titanium, JET-115 Carbon Fibre, Cerakote Black Oval, GT-115 Cerakote Black, Polished Oval, GT-115 Polished, GT-115 Titanium, GT-115 Brushed Titanium. The finish is cosmetic and does not change the sound.

Will it fit the Audi S3 2.0TFSI Quattro Saloon/Sedan 310PS 8Y (North American/Non-OPF Models Only)?

Yes. Milltek lists this part for the Audi S3 2.0TFSI Quattro Saloon/Sedan 310PS 8Y (North American/Non-OPF Models Only) as well as the other models in the fitment list above.

Does it fit the Audi S3 2.0TFSI Quattro Sportback 310PS & 333PS 8Y (OPF/GPF Models Only)?

No. For that car, choose the Milltek Filter-back Exhaust Audi S3 2.0TFSI Quattro Sportback 8Y OPF/GPF 20+.

Is it road legal?

Some versions are EC approved; check the EC Approved line in the specification for the option you choose.

Do I need a remap?

No. It fits behind the factory particulate filter, so no software changes are needed.

Does it keep the factory particulate filter?

Yes. It fits behind the factory particulate filter, which stays in place.

How long does it take to fit?

Milltek quotes approx. 1.5 to 2 hours.

What is it made from?

T304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration better than lower grades.