Originally Posted by matt95ssei
So then what are other problems???
First off the M62 is 180mm wide and the M90 is 192mm wide.The main problem is with the fuel injectiors and the fuel rail. If you look at the Series 2 L67'* they have the injectors in the heads itself because the M90 is so wide. On the Series 1 L67'* the injector are in the lower intake manifold because the M62 is smaller. Not only are the injectors in the lower intake manifold they aim at the head, so the top of the injector and fuel rail actually sits over the supercharger.
Mounting a M90 to a Series 1 is possible (anything is possible) but for the cost and R&D work your better off using your $$ on other mods (ie. like a cam) that will yeild bigger gains.