Hi, Just spotted this kit and some others like it on ebay: GT28 300BHP 20V 1.8T Turbo Kit - 98-05 Audi A4 Quattro on eBay (end time 30-May-11 15:02:23 BST) Looks like a decent alternative to a Ko4 swap with greater power potential. It mates to the OEM manifold too (apparently!) so no faffing about with manifold swaps. Has anyone any experience of these and how would you go about the mapping afterwards? Who would be the best people to approach? Thanks!