Tiptronic Audi A4 2.0 TFSI
I'm running your development DP and a resonated system, the system has been completely faultless since day one and offers just the right blend of performance gains and refinement to make the car perfect for both daily use & quiet cruising. It also offers a great sound upon hard acceleration for my Stage 2+ car and exceptional performance for a 2.0T.
Milltek has offered a performance cat-back exhaust system for the current model (B8 chassis) A4 2.0 TFSI S line since its introduction back in 2008.

While the cat-back system was flexible enough to fit the 2WD and quattro models, it was only able to fit vehicles with manual (stick-shift) transmission due to the Tiptronic having a larger gearbox casing.

However, Milltek has now developed a downpipe specifically for the Tiptronic models (again, 2WD and quattro) and fits all models built from 2008 onwards. It features larger-bore pipework (at 70mm), T304 stainless steel construction, a choice of either dual-outlet 100mm tailpipes or quad 80mm tailpipes. As with all Milltek exhausts it's hand-build in the United Kingdom and is designed as a genuine performance-modification.

The complete cat-back system is available right now from your nearest Milltek stockist.