Milltek Large-bore Downpipes for Audi RS4 B9 2.9 V6 Turbo Avant (Non OPF/GPF Models) (2018 onwards) – Improved Turbo Flow
This is Milltek's large-bore downpipe for the Audi RS5 B9.5 2.9 V6 Turbo Sportback (Non OPF Models). It replaces the factory downpipe with a larger-bore pipe for improved flow at one of the most restrictive points in the system. Check the specification below to see whether this particular version retains a catalyst or removes it.
If the catalyst has been removed, this is intended for off-road and competition use only, and the car won't be legal for road use fitted with it. Check the specification below for this system's catalyst and approval status.
Specifications
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System Type: Large-bore Downpipes
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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. 3 to 4 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
- Larger, less restrictive downpipe improves flow from the turbo outlet
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- Audi RS4 B9 2.9 V6 Turbo Avant (Non OPF/GPF Models) (2018 onwards)
- Audi RS5 B9 2.9 V6 Turbo Coupe (Non OPF/GPF Models) (2017-2019)
- Audi RS5 B9 2.9 V6 Turbo Sportback (Non-OPF/GPF Models) (2018-2019)
- Audi RS5 B9.5 2.9 V6 Turbo Coupe (Non OPF Models) (2019 onwards)
- Audi RS5 B9.5 2.9 V6 Turbo Sportback (Non OPF Models) (2019 onwards)
Not suitable for: Audi RS4 B9 OPF/GPF models, or any model not listed above.
Installation
Milltek quotes a fitting time of approx. 3 to 4 hours. Before ordering, note: With 200 Cell HJS HQ High Flow Cats (Requires 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 Active Valve Control Audi RS4 B9 2.9 V6 Turbo Avant Non OPF/GPF 18+, Milltek Cat-back Exhaust Audi RS4 B9 2.9 V6 Turbo Avant Non OPF/GPF 18+.
Will it fit the Audi RS5 B9 2.9 V6 Turbo Coupe (Non OPF/GPF Models)?
Yes. Milltek lists this part for the Audi RS5 B9 2.9 V6 Turbo Coupe (Non OPF/GPF Models) as well as the other models in the fitment list above.
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?
Yes. Milltek notes: "With 200 Cell HJS HQ High Flow Cats (Requires stage 2 ECU remap)". Without suitable software the engine management is likely to log faults.
How long does it take to fit?
Milltek quotes approx. 3 to 4 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.
