Milltek Cat-back Exhaust for Audi A4 3.0 TDi B8 quattro Saloon and Avant (2008-2011) – Sharper Sound, Reduced Back Pressure
This is Milltek's cat-back system for the Audi A4 3.0 TDi B8 quattro Saloon and Avant. It replaces everything from the factory catalytic converter rearward with wider-bore pipework, a re-profiled mid-pipe and silencers tuned specifically for this platform, cutting back pressure and sharpening the exhaust note. The factory catalytic converter stays in place, so the car's emissions hardware is left as standard. It's offered in 4 tailpipe finishes and a choice of outlet (Quad, Dual), so you can pick the setup that suits how the car's used.
It's aimed at owners who want a noticeably different sound and a genuine, if modest, flow improvement without touching anything upstream of the cat: a straightforward bolt-on that doesn't need a remap or any other supporting mods to enjoy.
Specifications
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System Type: Cat-back
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Pipe Diameter: 70mm (2.76")
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EC Approved: No
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Race System: No
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
- 70mm (2.76") pipework
- Replaces the standard exhaust from the catalytic converter back, so the factory cat is retained
- Choice of 4 tailpipe finishes: GT-80 Cerakote Black, GT-100 Polished, GT-100 Cerakote Black, GT-80 Polished
- Designed, developed and manufactured in the UK by Milltek Sport
Fitment
- Audi A4 3.0 TDi B8 quattro Saloon and Avant (2008-2011)
- Audi A5 Sportback 3.0 TDI quattro Manual/Multitronic/S tronic (2009 onwards)
Not every version fits every car in this list. Check the fitment shown for the option you select.
Not suitable for: the Audi A4 3.0 V6 B6 quattro Saloon Avant & Cabriolet, which needs the Milltek Cat-back Exhaust Audi A4 3.0 V6 B6 Quattro Saloon Avant Cabriolet 01-05.
Installation
The fitting time varies by version; see the specification table for the option you choose. Some versions: Cerakote Black Quad Outlet. Requires S-Line rear bumper in addition to S4 3.0T lower spoiler (part # 8K0 807 521 B 1RR) and detailing strip (part # 8T0 807 791 2ZZ) - approximately £100+VAT - from your local Audi dealer. Some versions: Quad Outlet. Requires S-Line rear bumper in addition to S4 3.0T lower spoiler (part # 8K0 807 521 B 1RR) and detailing strip (part # 8T0 807 791 2ZZ) - approximately £100+VAT - from your local Audi dealer. We recommend professional fitting on a ramp. Once fitted, check the tailpipe alignment and re-check all clamps after the first few hundred miles.
Which tailpipe finishes are available?
You can choose from: GT-80 Cerakote Black, GT-100 Polished, GT-100 Cerakote Black, GT-80 Polished. The finish is cosmetic and does not change the sound.
Will it fit the Audi A5 Sportback 3.0 TDI quattro Manual/Multitronic/S tronic?
Yes. Milltek lists this part for the Audi A5 Sportback 3.0 TDI quattro Manual/Multitronic/S tronic as well as the other models in the fitment list above.
Does it fit the Audi A4 3.0 V6 B6 quattro Saloon Avant & Cabriolet?
No. For that car, choose the Milltek Cat-back Exhaust Audi A4 3.0 V6 B6 Quattro Saloon Avant Cabriolet 01-05.
Is it road legal?
Milltek does not list EC approval for this part. Any exhaust used on the road must still meet noise and emissions rules, so check the requirements where you live.
Do I need a remap?
No. It fits behind the factory catalytic converter, so no software changes are needed.
Does it keep the factory catalytic converter?
Yes. It fits behind the factory catalytic converter, which stays in place.
How long does it take to fit?
It depends on the version. Milltek's fitting time for each option is shown in its specification table.
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.
