A3 performance lives here.
We spent considerable time examining how to maximize the performance and options of this exhaust system. The factory exhaust consists of a long downpipe with two catalytic converters, and two rather large mufflers in the section after the cats.
Thorough long term street testing has confirmed that our high flow downpipe, equipped with the 200 cell metal catalytic converter, will not set a Check Engine light or any fault codes in the ECU. For customers looking for ultimate power, our HJS German made metal catalytic converter featuring an Emitec core will provide an additional 9hp over our ceramic converter option.
Here are some features of our system. Each feature was chosen for performance and longevity reasons, and when making your exhaust decisions you should settle for nothing less:
- Fully mandrel bent tubing
- Thick .065" wall T304 stainless steel tubing
- Stainless steel internal muffler and resonator construction
- Stainless steel MIG and TIG welds
- Stainless steel T-bolt clamps
- Double walled exhaust tips to reduce heat discoloration
- Included OEM turbo to downpipe gasket
- In house dyno developed
Our catback systems will mate up to the stock downpipe, and our downpipe will mate to our catbacks or any other catback that is designed to mate up to the factory downpipe.
Why did we choose 2.5 inch and not 3.0 inch diameter for our A3 exhaust? Our first prototypes of this system were indeed 3.0 inch, but we found that the effort it took to move the large mass of air in the 3.0 inch system at lower rpms resulted in a loss of torque with very little offsetting gain up top. Take a look at our 3.0 inch prototype dyno sheets in the Performance Specs tab and see why a 3.0 inch system is not appropriate for this car.