Darkside development actually do an S3 upgrade for the diesel including the hard pipe kits probably looking best part of £500/£600. Darren
The Intercooler is £210 and the hardpipe kit is £340 if you have hybrid with S3 intercooler http://www.darksidedevelopments.co.uk/products/hard-pipework-kit-for-2-0-16v-tdi-pd140-bkd-engine.htmlDarren