Milltek Downpipes & Sports Cats for Audi RSQ8 4.0 V8 Bi-Turbo (OPF/GPF Equipped Models) (2020 onwards) – Improved Flow, Sports Catalyst
This is Milltek's large-bore downpipe with hi-flow sports cat for the Audi SQ7 4.0 V8 TT (Petrol OPF/GPF Equipped Vehicles Pre Facelift). 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: Large Bore Downpipes and Hi-Flow Sports Cats
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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. 3.5 to 4.5 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
- High-flow sports catalyst flows better than the dense factory unit while still treating exhaust gases
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- Audi RSQ8 4.0 V8 Bi-Turbo (OPF/GPF Equipped Models) (2020 onwards)
- Audi SQ7 4.0 V8 TT (Petrol OPF/GPF Equipped Vehicles Pre Facelift) (2021-2024)
- Audi SQ8 4.0 V8 Bi-Turbo (Petrol OPF/GPF Equipped Models Pre Facelift) (2020-2024)
Not suitable for: the Audi RSQ8 4.0 V8 Bi-Turbo (Non OPF/GPF Equipped Models), which needs the Milltek Downpipes & Sports Cats Audi RSQ8 4.0 V8 Bi-Turbo Non OPF/GPF 20+.
Installation
Milltek quotes a fitting time of approx. 3.5 to 4.5 hours. Before ordering, note: 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.
Will it fit the Audi SQ7 4.0 V8 TT (Petrol OPF/GPF Equipped Vehicles Pre Facelift)?
Yes. Milltek lists this part for the Audi SQ7 4.0 V8 TT (Petrol OPF/GPF Equipped Vehicles Pre Facelift) as well as the other models in the fitment list above.
Does it fit the Audi RSQ8 4.0 V8 Bi-Turbo (Non OPF/GPF Equipped Models)?
No. For that car, choose the Milltek Downpipes & Sports Cats Audi RSQ8 4.0 V8 Bi-Turbo Non OPF/GPF 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?
Yes. Milltek notes: "Requires a Stage 2 ECU remap". Without suitable software the engine management is likely to log faults.
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. 3.5 to 4.5 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.
