Overview
The Milltek Large Bore Downpipe with Hi-Flow Sports Catalyst is engineered for the Audi B9 A4 2.0 Quattro Saloon and Avant. This direct-fit component optimizes exhaust flow from the turbocharged engine to the cat-back system, delivering measurable gains in horsepower and torque while maintaining emissions compliance.
Constructed from T304L stainless steel with mandrel-bent 3" (76.2 mm) piping, the downpipe features a high-flow sports catalyst rated at 200 CPSI (cells per square inch). Hand-finished construction ensures OEM+ fitment with existing Audi factory or Milltek cat-back exhaust systems. Requires Stage 2 ECU software for optimal performance mapping.
Details
Fitment Notes & Compatibility
- 2017+ Audi B9 A4 Saloon (2.0 TFSI EA888)
- 2017+ Audi B9 A4 Avant (2.0 TFSI EA888)
- Quattro and FWD variants
- Direct fit to OEM or Milltek cat-back exhaust
- No modifications required
Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.
Fitment
| Years | Make | Model | Engine Family | Engine | Trim |
|---|---|---|---|---|---|
| 2017-2019 | Audi | A4 | EA888 Gen 3B | 2.0T | All |
