www.turbochargingdynamics.com is a good place to start. They have a great $600 manifold- trouble is you really must change the ECU as Motronic will not workwith forced induction. Megasquirt is the ideal option, once installed you can chuck the AFM as it replaes it with a MAP sensor which runs from a pipe going to the the intake manifold. Is your motor strong? You will need to check/change the headgasket and get serious head (ARP?) studs, etc etc. www.millerperformancecars.com have a very interesting setup also...Originally Posted by e34.535i.sport