Milltek Cat-back Exhaust for Audi RS3 Saloon/Sedan 400PS (8V MQB) - Non-OPF/GPF Models (2017 onwards) – Sharper Sound, Reduced Back Pressure
This is Milltek's cat-back system for the Audi RS3 Saloon/Sedan 400PS (8V MQB) - OPF/GPF Models. It replaces everything from the factory catalytic converter rearward with wider-bore pipework, a re-profiled mid-pipe and silencers tuned specifically for this platform, cutting back pressure and sharpening the exhaust note. The factory catalytic converter stays in place, so the car's emissions hardware is left as standard. It's offered in non-resonated or resonated EC approved versions and 8 tailpipe finishes, so you can pick the setup that suits how the car's used.
It's aimed at owners who want a noticeably different sound and a genuine, if modest, flow improvement without touching anything upstream of the cat: a straightforward bolt-on that doesn't need a remap or any other supporting mods to enjoy.
Specifications
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System Type: Cat-back
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Race System: No
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
- Replaces the standard exhaust from the catalytic converter back, so the factory cat is retained
- Choice of 8 tailpipe finishes: Burnt Titanium, Cerakote Black, Polished, Titanium, Burnt Titanium Oval, Cerakote Black Oval, Polished Oval, Titanium Oval
- EC approved versions available
- Resonated (quieter) or non-resonated (louder) versions
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- Audi RS3 Saloon/Sedan 400PS (8V MQB) - Non-OPF/GPF Models (2017 onwards)
- Audi RS3 Saloon/Sedan 400PS (8V MQB) - OPF/GPF Models (2019 onwards)
Not suitable for: Audi RS3 Saloon OPF/GPF Models models, or any model not listed above.
Installation
The fitting time varies by version; see the specification table for the option you choose. 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 Active Valve Control Audi RS3 Saloon 400PS 8V MQB - Non-OPF/GPF 17+, Milltek Downpipe & De-cat Audi RS3 Saloon 400PS 8V MQB - Non-OPF/GPF 17+.
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.
Which tailpipe finishes are available?
You can choose from: Burnt Titanium, Cerakote Black, Polished, Titanium, Burnt Titanium Oval, Cerakote Black Oval, Polished Oval, Titanium Oval. The finish is cosmetic and does not change the sound.
Will it fit the Audi RS3 Saloon/Sedan 400PS (8V MQB) - OPF/GPF Models?
Yes. Milltek lists this part for the Audi RS3 Saloon/Sedan 400PS (8V MQB) - OPF/GPF Models as well as the other models in the fitment list above.
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 catalytic converter, so no software changes are needed.
Does it keep the factory catalytic converter?
Yes. It fits behind the factory catalytic converter, which stays in place.
How long does it take to fit?
It depends on the version. Milltek's fitting time for each option is shown in its specification table.
What is it made from?
T304L aircraft-grade stainless steel, which is anti-magnetic and resists discolouration better than lower grades.
Is there a warranty?
Yes. Milltek products are covered against defects in materials and workmanship. Contact us with your order number if you have a problem.
