Power, sophistication and perfect sound - what your B8.5 requires:
The stock exhaust system on a B8.5 A4 is full of crimped tubing obstructs exhaust flow and robs horsepower. The AWE Tuning B8.5 A4 Touring Edition Exhaust annd Downpipe are designed using CAD modeling software to produce smooth gradual bends and to eliminate any interruption to the flow of exhaust gasses. These improvements to the exhaust path result in gains of 8-9 horsepower and 6-7 lb ft of torque at the crank.
Sound Perfection: AWE Tuning 180 Technology™
As exhaust gases exit the 2.0L Turbo engine and flow into an AWE Tuning 180 Technology™ equipped resonator, they pass through strategically located ports, and into reflection chambers. Sound waves, carried by these exhaust gasses, bounce off the walls of the reflection chambers. By controlling the size and location of the ports and the chambers, it is possible to control when the sound waves exit the chambers. The specific timing of when the reflected sound waves re-join the main exhaust flow creates a one-hundred-and-eighty-degree out-of-phase sound wave that cancels out problematic frequencies.
Options and Tips
The quad tip version of the AWE Tuning A4 Touring Edition Exhaust features four 90mm (3.50 inch) slash cut tips, located on each side of the car. As with all the systems, each tip is available in Chrome Silver or Diamond Black. The tips sport engraved AWE Tuning logos and are double-walled to ensure a mirror polish, even under hard usage. Each tip is individually adjustable, so stagger and depth into bumper can be set according to personal taste. This system will not work with the factory valence and requires the purchase of a conversion kit in order to allow quad tip fitment.
Additional sound level tuning
For the enthusiast interested in a more aggressive sound, consider adding a downpipe. The factory unit contains a fairly large straight through resonator. By replacing this large piece with a more compact but still straight through resonator, sound volume is increased while adding a slightly deeper tone. Testing showed no power increase in adding the downpipe. It will mate to teh AWE exhaust system or any other exhaust designed to work with the stock downpipe.