This is my first time on this site and I hope I will be able to learn and provide some info. I have a 2010 base 528i 6MT and I've read that the N52 can produce to 260 -280hp. In review the 2008 530i post 272hp. From what I have been able to find is that a 3 stage manifold, matched exhaust, and an ECU tune will produce those numbers on a N52 engine. I have several questions. Number one, can those numbers be attained? Two, where can you purchase the required parts? Three, where can you get the required tune? When I look on the BMW performance sites I do not find any parts of this type for the N52, only N54 engines. If anyone can provide this info I would be willing to share and most likely make the mods. Thanks - TLewis