I bought this to convert my 525i to a 530i but have since bought an actual 530i so no longer needed. It is for the N53 engine. It arrived yesterday, came from a guy breaking a 330i privately. I have had it out for the box for inspection and all looks OK. I particularly asked that he include all the relevant pipes, I haven't changed one of these manifolds myself so I can't say for certain but it looks pretty complete to me. Comes with both DISA valves and the ERG kit. Ask for photos if you are coming a long way so you can check for yourself.£185 shipped within the UK