I am thinking of calling Kim Collins [who's done all the work on the car thus far] and also MRC (as all I've heard are very good things regarding MRC)
Current situation is:
69k
Stage 3 MTM map + full Milltek (+Koni dampers+B7 brake upgrade+gmbh drilled rear discs+H&R ARB's+DTS...oh, and a Tanoga short shift

So according to the dyno, she has 471bhp.
But.....itchy feet again....
Anyway - as I understand it so far - to get up to 'the next level' (which I consider as mid to high 500's) I would need (basically) RS6 turbos but they'd appear to require some machining to get them to fit?
May be a stupid question but....does this basically involve binning the existing map (wasted cash IMO) and having to pay for a new custom map?
Is there anything other than going up to the bigger turbos I'd HAVE to do as a precaution or a requirement?
(and I'm assuming I'm looking in the region of 5k to have this done properly?)
Thanks in advance chaps