Description
aFe Downpipe – 2009–2016 Audi A4 / A5 (B8) 2.0T Twisted Cat replace a factory exhaust section with a freer-flowing, mandrel-routed system that also changes the vehicle's sound and rear-end presentation. This listing is built around aFe POWER part number 48-36410-YC for the 2009–2016 Audi A4 / A5 (B8) 2.0T Twisted Cat.
aFe's performance exhaust systems are engineered around tubing diameter, bend quality, merge transitions, muffler/resonator strategy, hanger placement and tip configuration. Those details determine not only restriction but also tone, volume, clearance and how well the system integrates with the chassis.
What This Means on the Car
An exhaust should be selected for the complete use case. Larger tubing and lower restriction can support additional airflow, but sound character is equally important on a street car. Axle-back systems primarily change the rear section and sound; cat-back and larger upstream systems address more of the exhaust path.
Fitment & Part Numbers
Application: 2009–2016 Audi A4 / A5 (B8) 2.0T Twisted Cat
aFe POWER part number: 48-36410-YC
Fitment can differ by engine, drivetrain, trim, factory equipment, emissions configuration and production date. Match the part number above to the vehicle before installation; where aFe publishes SKU-specific installation or emissions requirements, those requirements take precedence.
Legacy Racing Enthusiast Perspective
We recommend deciding first how much additional sound you actually want, then choosing the system architecture. For track-capable street cars, we also consider local sound limits and whether a muffler/resonator configuration leaves enough margin for future engine modifications. On the 2009–2016 Audi A4 / A5 (B8) 2.0T Twisted Cat, we would make the purchase decision around the limitation this component addresses and how it fits with the car's current and planned modifications.