Milltek Turbo-back Exhaust & Sports Cat for Audi S3 2.0 TFSI quattro 3-Door 8V/8V.2 (Non-GPF Equipped Models Only) (2013-2018) – Sharper Sound, Reduced Back Pressure
This is Milltek's large-bore downpipe with hi-flow sports cat for the Audi S3 2.0 TFSI quattro 3-Door 8V/8V.2 (Non-GPF Equipped Models Only). It replaces the restrictive factory downpipe with a larger-bore pipe fitted with a high-flow sports catalyst in place of the standard unit, using a less dense substrate that flows significantly better than the factory cat while still treating the exhaust gases passing through it.
It sits between a stock downpipe and a full de-cat: a genuine flow gain suited to a Stage 1 or Stage 2 remap, without giving up the catalyst entirely the way a de-cat pipe does.
In the UK, a replacement catalyst on a car first registered from 1 March 2001 needs ECE R103 type-approval to be road legal, so check the EC Approved line in the specification for the version you choose.
Specifications
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System Type: Turbo-back including Hi-Flow Sports Cat
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Pipe Diameter: 76.2mm (3")
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Tip Style: Quad 100mm GT100
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EC Approved: No
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Race System: Yes
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
- 76.2mm (3") pipework
- Replaces the standard exhaust from the catalytic converter back, so the factory cat is retained
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- Audi S3 2.0 TFSI quattro 3-Door 8V/8V.2 (Non-GPF Equipped Models Only) (2013-2018)
Not suitable for: the Audi S3 2.0 TFSI quattro Sportback 8V.2 (GPF Equipped Models Only), which needs the Milltek Cat-back Exhaust Audi S3 2.0 TFSI Quattro Sportback 8V.2 GPF 19-20; the Audi S3 2.0 TFSI quattro Saloon & Cabrio 8V.2 (GPF Equipped Models Only), which needs the Milltek Cat-back Exhaust Audi S3 2.0 TFSI Quattro Saloon Cabrio 8V.2 GPF 19-20; the Audi S3 2.0 T quattro 3-Door 8P, which needs the Milltek Turbo-back Exhaust & Sports Cat Audi S3 2.0 T Quattro 3dr 8P 06-12.
Installation
Before ordering, note: Resonated (quieter). Requires a Stage 2 ECU remap. 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 & Sports Cat Audi S3 2.0 TFSI Quattro 3dr 8V 8V.2 Non-GPF 13-18.
Does it fit the Audi S3 2.0 TFSI quattro Sportback 8V.2 (GPF Equipped Models Only)?
No. For that car, choose the Milltek Cat-back Exhaust Audi S3 2.0 TFSI Quattro Sportback 8V.2 GPF 19-20.
Is it road legal?
Milltek lists this as a race part without EC approval, so it is intended for off-road and competition use.
Do I need a remap?
Some versions do. Milltek notes: "Resonated (quieter). Requires a Stage 2 ECU remap". Check the notes for the version you choose.
Does it keep the factory catalytic converter?
Yes. It fits behind the factory catalytic converter, which stays in place.
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.
