Why bother? You might as well pay your local exhaust shop to weld you up a part to expand that crimp if nothing else. If money is a problem, don't even start changing out turbos and down pipes. Just get REVO (or any other serial port "chip"), pay some other TT owner $50 for his 225 exhaust that's sitting in his garage, get Modshack Stage 1 to 3, and get about 30 to 50 horse power gain for under $1500.

2002 180 QC Denim Blue (in order of install)
OEM Roof Rack, Forge DVR, REVO SPS1,
TTDA, Seat Delete
Stock 225 exhaust, 3.2 rear valance
17" RS4 replicas, Neuspeed 19 mm rear sway bar, de-vaned and de-screened maf.