The Euro spec M3 motor is a totally different motor rebuilt from the ground up where as the US spec M3 is a modified M50 motor w/ thicker cyl walls, larger displacement and other differences. Just slapping on the multi-throttle intake manifold may or may not do something, it depends if on the US spec M3 motor the restriction is the air flow. If it is, the intake system is useless unless you also increase the diammeter of the intake ports right before the manifold.
You can't just expect to spend money and keep slapping things on. You actually have to find a shop to dyno your car and tell you the specs you need everything to be. My advice is to either buy everything BMP (if you want this manifold) or have one custom made to your specs and requirements. I don't think anyone here really has any BMW that will require this type of modification. You can only go so far with bolt-on mods. After that, you really have to get into the oily bit.
'02 C32 AMG / '07 C280 / '07 CLS550 / '15 JKU Rubicon
Last edited by Autotechnica; 07-28-2003 at 02:21 AM.