The're Graphite not black!!
Massive job! Pretty sure the A3 1.8t came with the K03 rather than the K03s which was fitted to the Leon Cupra and TT (both have the AUQ engine) This engine like the BAM which is one of the k04 equipped 225 engines came with variable valve timing and a different head. You will need a custom manifold, exhaust changes, custom remap to suit the turbo. As well as a front mount intercooler if you want to make the most of the new turbo.
Official Fan Club member No 001!!