Milltek HJS Tuning ECE Downpipes for Audi RS3 Saloon/Sedan 400PS (8V MQB) - Non-OPF/GPF Models (2017 onwards) – Improved Flow, Sports Catalyst
This is Milltek's HJS Tuning ECE downpipe set for the Audi TT Mk3 TTRS 2.5TFSI Quattro (Non-OPF/GPF Models). These replace the factory downpipes with HJS high-flow sports catalysts that carry full ECE type-approval, so you get a genuine flow improvement over the restrictive factory units without taking the car outside emissions compliance.
They're aimed at drivers who want more from the downpipes than the standard units allow, but need the car to stay legally usable on the road and pass an emissions test, which a straight de-cat pipe won't do.
Because they're type-approved, these can be run on a car that's used on the road, unlike a straight de-cat pipe.
Specifications
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System Type: HJS Tuning ECE Downpipes
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Pipe Diameter: 63.55mm (2.5")
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EC Approved: Yes
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Race System: No
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Fitting Time: approx. 3 to 3.5 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
- 63.55mm (2.5") pipework
- High-flow sports catalyst flows better than the dense factory unit while still treating exhaust gases
- EC approved
- 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 Sportback 400PS (8V MQB - Facelift Only) - Non-OPF/GPF Models (2017-2018)
- Audi TT Mk3 TTRS 2.5TFSI Quattro (Non-OPF/GPF Models) (2016 onwards)
Not suitable for: the Audi RS3 Saloon/Sedan 400PS (8V MQB) - OPF/GPF Models, which needs the Milltek Downpipe & Sports Cat Audi RS3 Saloon 400PS 8V MQB OPF/GPF 19+.
Installation
Milltek quotes a fitting time of approx. 3 to 3.5 hours. Before ordering, note: ECE Approved fits to Milltek Sport & OE Catback Systems. 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 Active Valve Control Audi RS3 Saloon 400PS 8V MQB - Non-OPF/GPF 17+, Milltek Cat-back Exhaust Audi RS3 Saloon 400PS 8V MQB Non-OPF/GPF 17+.
Will it fit the Audi RS3 Sportback 400PS (8V MQB - Facelift Only) - Non-OPF/GPF Models?
Yes. Milltek lists this part for the Audi RS3 Sportback 400PS (8V MQB - Facelift Only) - Non-OPF/GPF Models as well as the other models in the fitment list above.
Does it fit the Audi RS3 Saloon/Sedan 400PS (8V MQB) - OPF/GPF Models?
No. For that car, choose the Milltek Downpipe & Sports Cat Audi RS3 Saloon 400PS 8V MQB OPF/GPF 19+.
Is it road legal?
Every version of this part is listed by Milltek as EC approved.
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?
Yes. Milltek lists it for use with the factory (OE) exhaust system.
How is a sports cat different from a de-cat?
A sports cat still contains a catalyst, just a less dense one that flows better than the factory unit. A de-cat removes the catalyst completely.
How long does it take to fit?
Milltek quotes approx. 3 to 3.5 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.
