Audi S4 downpipes
12 downpipes for the B9 Audi S4 (3.0T V6) from 8 brands. The downpipe joins the turbocharger outlet to the rest of the exhaust. Aftermarket versions are sold with a high-flow catalytic converter or without one.
Before you order
- Removing or replacing a catalytic converter with a part that is not certified for the vehicle is illegal for road use under the federal Clean Air Act. Catless parts are sold for off-road use only.
- In California and other CARB states a replacement converter needs an Executive Order number for the specific vehicle.
- Check the retailer listing for whether engine software changes are required.
- Listings are read from the retailer's B9 S4 (3.0T, quattro) category. Confirm engine, drivetrain and model year on the retailer page before ordering.
Brands on this page: Supersprint (3), Armytrix (2), Milltek Sport (2), ARM Motorsports (1), CTS (1), ECS (1), Integrated Engineering (1), Unitronic (1).
Downpipe (11)
Armytrix · Part no. AU94S-CD
ARMYTRIX Sport Cat-Pipe
Sport Cat-Pipe with 200 CPSI Catalytic Converter - Increase power, reduce weight, and improve sound!
Armytrix · Part no. AU94S-CDC
ARMYTRIX Sport Cat-Pipe - Ceramic Coated
Ceramic Coated Sport Cat-Pipe with 200 CPSI Catalytic Converter - Increase power, reduce weight, and improve sound!
CTS · Part no. CTS-EXH-TP-0009C
CTS Turbo B9 S4/S5 High Flow Cat
CTS Turbo high flow cat is made to maximize exhaust flow for highest power gains - Do not compromise performance and sound with factory parts - Unleash your B9 S4/S5 3.0T Potential!
ECS · Part no. 016752LA02KT
B9 S4/S5 Downpipe & Resonator Delete Kit
No cutting required, easy-to-install downpipes with resonator deletes for your factory cat back exhaust.
Integrated Engineering · Part no. IEEXCK6
IE ProCore Performance Cast Downpipe - B9 S4/S5
Check-Engine Light free! An emissions-friendly approach to exhaust upgrades!
Milltek Sport · Part no. SSXAU673
2.5" High-Flow Downpipe
Featuring Milltek Sport Hi-Flow sports cat, fits with OE and Milltek cat-back systems.
Milltek Sport · Part no. SSXAU725
HJS Tuning 2.5" High-Flow ECE Downpipes
Featuring HJS Tuning 200cpsi ECE-approved sports cat - Fits with OE and Milltek cat-back systems.
Supersprint · Part no. 777512
Performance Downpipe Kit - Non-Resonated
T304 Stainless Steel high flow front pipe kit replaces factory secondary catalytic converters
Supersprint · Part no. 777532
Performance Downpipe Kit - Resonated
T304 Stainless Steel front pipe kit includes high flow secondary catalytic converters
Supersprint · Part no. 777521
Performance High Flow Catalytic Converter
304 Stainless high-flow front metallic catalytic converter/downpipe - 100% handcrafted in Italy!
Unitronic · Part no. UH044-EXA
Performance Downpipe For B9 S4/S5
Reduce turbo lag and enhance the exhaust note
Catalytic Converter (1)
ARM Motorsports · Part no. B930TDPC
Audi B9 3.0T S4 S5 Catted Downpipe
Increased Power and Torque, Massive 6.5" Design, Faster Turbo Spool, and Improved Exhaust Note
More Audi S4 parts
- Audi S4 exhaust systems
- Audi S4 exhaust tips
- Audi S4 intakes
- Audi S4 charge pipes
- Audi S4 tunes & engine software
- Audi S4 intercoolers & charge cooling
- Audi S4 turbochargers & turbo parts
- Audi S4 fuel & ignition
- Audi S4 cooling upgrades
- Audi S4 engine & mounts
- Audi S4 drivetrain
- Audi S4 coilovers
- Audi S4 lowering springs
- Audi S4 suspension & chassis
- Audi S4 brake upgrades
- Audi S4 wheels
- Audi S4 wheel spacers & hardware
- Audi S4 front lips & splitters
- Audi S4 spoilers & wings
- Audi S4 rear diffusers
- Audi S4 exterior & aero
- Audi S4 interior
- Audi S4 lighting