Audi A4 downpipes
5 downpipes for the B9 Audi A4 (2.0T) from 5 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 A4 (2.0T, quattro) category. Confirm engine, drivetrain and model year on the retailer page before ordering.
Brands on this page: Armytrix (1), ECS (1), Integrated Engineering (1), JH Motorsports (1), Milltek Sport (1).
Downpipe (4)
Armytrix · Part no. AUB9-CD
Sport Cat Downpipe W/200 CPSI Catalytic Converter
Delivers more power, especially in the low and mid rev range while adding a deep sporty sound.
Retailer fitment note: For vehicles up through 2020
ECS · Part no. 021616ECS01KT
B9 T304 Stainless Steel 3.0" Downpipe
Let your engine breathe and growl with our front resonator delete!
Integrated Engineering · Part no. IEEXCK9
IE ProCore Downpipe - B9 A4
Features a full and complete exhaust note with increased flow!
JH Motorsports · Part no. B9A45DP
3" Downpipe
3.0" T304 Stainless system produces gains of up to 15hp.
Retailer fitment note: For vehicles up through 2020
Catalytic Converter (1)
Milltek Sport · Part no. SSXAU744
Large Bore Downpipe And Hi-Flow Cat
Downpipe with HJS 200-Cell High Flow Cat
More Audi A4 parts
- Audi A4 exhaust systems
- Audi A4 exhaust tips
- Audi A4 intakes
- Audi A4 charge pipes
- Audi A4 tunes & engine software
- Audi A4 intercoolers & charge cooling
- Audi A4 turbochargers & turbo parts
- Audi A4 fuel & ignition
- Audi A4 cooling upgrades
- Audi A4 engine & mounts
- Audi A4 drivetrain
- Audi A4 coilovers
- Audi A4 lowering springs
- Audi A4 suspension & chassis
- Audi A4 brake upgrades
- Audi A4 wheels
- Audi A4 wheel spacers & hardware
- Audi A4 front lips & splitters
- Audi A4 spoilers & wings
- Audi A4 rear diffusers
- Audi A4 exterior & aero
- Audi A4 interior
- Audi A4 lighting