Milltek Downpipe & De-cat for Audi A3 1.8 TSI 2WD 3-Door (2008-2012) – Maximum Flow, Motorsport Use
This is Milltek's large-bore downpipe and de-cat for the Audi A3 1.8 TSI 2WD 3-Door. It replaces the factory downpipe with a larger-bore pipe and removes the catalytic converter entirely, clearing the single most restrictive point in the exhaust for the biggest flow gain available at this position in the system. It's usually fitted alongside a Stage 2 remap, since the ECU needs to be told to expect the different readings the lambda sensors give once the cat's gone.
It's built for owners already committed to a serious power upgrade rather than a casual bolt-on, so pair it with the matching Milltek cat-back system for the full effect.
Because it removes the cat, it's intended for off-road and competition use. A de-catted car will fail an MOT emissions test and isn't legal to use on UK roads.
Specifications
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System Type: Large-bore Downpipe and De-cat
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Pipe Diameter: 76.2mm (3")
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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
- Removes the factory catalyst for maximum flow (off-road and competition use only)
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- Audi A3 1.8 TSI 2WD 3-Door (2008-2012)
- Audi A3 2.0T FSI 2WD 3 door (2003-2012)
- Audi A3 2.0T FSI 2WD 5 door Sportback (2003-2012)
- Audi A3 2.0T FSI quattro 5 door SportBack (2004-2012)
- Audi S3 2.0 T quattro 3-Door 8P (2006-2012)
- Audi S3 2.0 T quattro Sportback 8P (2007-2012)
- Seat Leon Cupra 2.0T FSI 240PS (2006-2011)
- Seat Leon Cupra K1 (2007-2009)
- Seat Leon FR 2.0 T FSI 200-211PS (2006-2013)
- Skoda Octavia vRS 2.0 TSI (2010-2013)
- Volkswagen Golf Mk5 GTi 2.0T FSI (2004-2009)
- Volkswagen Golf Mk5 GTi Edition 30 2.0T FSi 230PS (2006-2009)
- Volkswagen Golf Mk6 GTi 2.0 TSI 210PS (2009-2013)
- Volkswagen Golf Mk6 R 2.0 TFSI 270PS (2009-2013)
- Volkswagen Jetta Mk5 GLI 2.0T FSI (2006-2010)
- Volkswagen Scirocco GT 2.0 TSi 200PS (2008-2016)
Not suitable for: any model, engine or body style not listed above. Check your car before ordering.
Installation
Before ordering, note: Must be fitted with the Milltek Sport cat-back system and requires a Stage 2 ECU remap. This work involves removing parts close to the turbo and engine, so we recommend fitting by a specialist with a ramp and suitable software support.
Upgrade Further
Also available from Milltek for this car: Milltek Turbo-back Exhaust & Sports Cat Audi A3 1.8 TSI 2WD 3dr 08-12.
Will it fit the Audi A3 2.0T FSI 2WD 3 door?
Yes. Milltek lists this part for the Audi A3 2.0T FSI 2WD 3 door as well as the other models in the fitment list above.
Is it road legal?
No. Removing the catalyst means the car will fail an MOT emissions test, so it is for off-road and competition use only.
Do I need a remap?
Yes. Milltek notes: "Must be fitted with the Milltek Sport cat-back system and requires a Stage 2 ECU remap". Without suitable software the engine management is likely to log faults.
Can I use it with my standard exhaust?
No. Milltek states it must be fitted with the matching Milltek system, so budget for the cat-back as well.
Will removing the cat cause a warning light?
Without suitable software it is likely to, as the ECU expects the readings a working catalyst gives. This is why Milltek pairs it with a remap.
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.
