Milltek Downpipe & De-cat for Mercedes A-Class A45 AMG 2.0 Turbo (W176) (2012-2018) – Maximum Flow, Motorsport Use
This is Milltek's large-bore downpipe and de-cat for the Mercedes CLA-Class CLA45 AMG 2.0 Turbo. 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
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Fitting Time: approx. 2 to 2.5 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
- 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
- Mercedes A-Class A45 AMG 2.0 Turbo (W176) (2012-2018)
- Mercedes CLA-Class CLA45 AMG 2.0 Turbo (2013-2018)
Not suitable for: the Mercedes A-Class A45 & A45S AMG 2.0 Turbo (W177 Hatch Only), which needs the Milltek Downpipe & De-cat Mercedes A-Class A45 & A45S AMG 2.0 Turbo W177 Hatch 19-21.
Installation
Milltek quotes a fitting time of approx. 2 to 2.5 hours. Before ordering, note: For fitment with the Milltek Sport Cat Back System Only. 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 Cat-back Exhaust Mercedes A-Class A45 AMG 2.0 Turbo W176 12-18.
Will it fit the Mercedes CLA-Class CLA45 AMG 2.0 Turbo?
Yes. Milltek lists this part for the Mercedes CLA-Class CLA45 AMG 2.0 Turbo as well as the other models in the fitment list above.
Does it fit the Mercedes A-Class A45 & A45S AMG 2.0 Turbo (W177 Hatch Only)?
No. For that car, choose the Milltek Downpipe & De-cat Mercedes A-Class A45 & A45S AMG 2.0 Turbo W177 Hatch 19-21.
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?
A suitable remap is strongly recommended, as the engine management needs to account for the change in flow and sensor readings. Speak to your tuner before fitting.
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.
How long does it take to fit?
Milltek quotes approx. 2 to 2.5 hours.
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.
