Audi A4 2.0 TFSI 2WD B7 cat-back system
Just fitted a Milltek resonated exhaust on my '08 R8! Man...what a sound...should have done this ages ago. It's not too loud, just a little louder, and enough that I'm driving everywhere with the window cracked open!
Milltek Sport have released a cat-back system for the 2005 onwards B7 model of the Audi A4 2.0 FSI Turbo (front wheel drive / frontrac).

The cat-back system consists of a connecting pipe, centre silencer, left-hand and right-hand rear silencers, and dual 100mm (4") tailpipes. The larger-than-standard tailpipes fit the cutouts in the rear bumper more closely and enhance the look of the rear of the car whilst remaining true to the original design. It's classic Milltek - genuine performance enhancement, sounds that are truly awesome, looks that are subtle but sexy and a feeling of true exhilaration.